Linux OS & Server Applications

OSTicket Helpdesk Software

2018-10-17T06:49:00.002-07:00

Introduction:

Hello dabarkads, this time we will be discussing some interesting software that has an important applications in the office administration and transactions. The said software able to solve problem that was been a problem to clerical works and since we are working to centralized MIS today , having this ticketing software installed would minimized complexity , repeatability and redundancy of office scheduling,ticketing and book keeping.

OsTicket software is a service management suite that comprises ticketing, workflow automation and notification, along with a wide range of customizable features. It is used by IT service management, customer service and corporate security help desks to better structure their communication and tasks.

It is no wonder why most offices choose this software as their booking/ticketing platform. Aside from its free and opensource it has an available documentation online which developer can customize its templates, styles and software improvement.

Requirements:
Host server
OS: Ubuntu 16.04/18.04

Download sites:
https://github.com/osTicket/osTicket

Objectives:
To create software that will help booking/ticketing easy for office management.

Methodology:

1) Install Mysql
robook# sudo apt-get update
robook# sudo apt-get mysql-server

2) Install Apache2
robook# sudo apt-get install apache2

3) Install Php7.0 ( version to Ubunto 16.04)
robook# sudo apt-get intsall php7.0 php7.0-*

4) Install APcu extension
robook# sudo apt-get install php-apcu

5) Download osticket
git clone https://github.com/osTicket/osTicket
or
robook# wget https://github.com/osTicket/osTicket/releases/download/v1.11.0-rc1/osTicket-v1.11.0-rc1.zip
robook# unzip osTicket-v11.0-rc.zip
robook# mv osTicket-v11.0-rc osticket
robookk# sudo cp -r osticket /var/www/html/osticket

6) Setup osticket web folder
robook# chown -R www-data:www-data osticket
robook# chmod -R 777 osticket
robook# cp osticket/include/ost-sampleconfig.pho osticket/upload/include/ost-config.php

7) Confifure webhost for osticket
robook# sudo vim /etc/apache2/sites-available/osticket.conf

     ServerAdmin xxxxx@yyy.edu.ph
     ServerName osticket.com
     ServerAlias www.osticket.com
    # DocumentRoot /var/www/html/osticket

     Alias /osticket "/var/www/html/osticket/"

        Options +FollowSymlinks
        AllowOverride All
        Require all granted
            Dav off
       # SetEnv HOME /var/www/html/osticket
       # SetEnv HTTP_HOME /var/www/html/osticket

     ErrorLog ${APACHE_LOG_DIR}/osticket_error.log
     CustomLog ${APACHE_LOG_DIR}/osticket_access.log combined

robook# sudo vim /etc/hosts
machine IP address domain name
ex:
10.10.10.28 osticket.com

8) Enable configuration
robook# aen2site osticket.conf
robook# sudo service apache2 restart

8.a ) Check the list of libraries for PHP 7.1

9) Open the osticket browser
http://ip-address/upload/index.php
and start filling up the required field

9.a)After the data/values are supplied

10) Already installed osticket

11) OsTicket website

12) OsTicket Administrator configuration

13) OsTicket web templates for ticketing

14) Sample ticketing

Remarks:
Trouble: "mail returned "
Shooting: Please install "sendmail"
sudo apt-get install sendmail
Trouble: Cannot send email
Shooting: Configure IMAP or SMTP server
SERVER: smtp.gmail.com:587
USERNAME: myemailaddress
PASSWORD: myemailaccountpassword
SMTP from Address: myemailaddress including @gmail.com
(the error snippet above was the results of this test)
Please configured as follows:

SERVER: smtp.gmail.com
USERNAME: myemailaddress
PASSWORD: myemailaccountpassword
SMTP from Address: myemailaddress including @gmail.com

Summary:

Conclusions:

Nextcloud On Ubuntu 18.04 Bionic Beaver Linux

2018-05-03T01:08:00.001-07:00

Introduction:

NextCloud will be used as storage for the admini types of documents and Eprints for the Academic type of documents. Our best choice is nextcloud as a truly open source software fork of OwnCloud. A 100% open source self-hosted cloud storage services and storing capacity ca b e extended to a local disk drive or Network Array Storage (NAS).

In our NextCloud deployment, we will use stable Ubuntu 18.04 LTS with Apache2, MariaDB, PHP and Let’s Encrypt SSL support. In addition, we will take the advantage of extending its storage capacity through linking DropBox,google drive,WebDav,NAS, and other cloud storage services. We can also mount local storage such as HDD,SDD arrayed in the network or private cloud services on users’ own servers. It system enable a self-hosted file sync and share app platforms and with them you can access & sync your files, contacts and data across your devices.

In today’s ICT environments, it is one of the most efficient solution frequently being installed with SSL/TLS encryption to secure data and also all traffic to and from the platform is protected over HTTPS.

Below are the steps and procedures to install and deploy Nextcloud system .

Requirements:

Software : Ubuntu 18.04,Nextcloud 18.04,Apache2 ,Php 7.2 Mysql-MarianDB

Hardware: Odroid C1, LAN

Methodology:

STEP 1: INSTALL APACHE2

NextCloud requires a webserver to function and the most popular web server in use today is Apache2. So, go and install Apache2 on Ubuntu by running the commands below:

sudo apt install apache2

After installing Apache2, run the commands below to disable directory listing.

sudo sed -i "s/Options Indexes FollowSymLinks/Options FollowSymLinks/" /etc/apache2/apache2.conf

Next, run the commands below to stop, start and enable Apache2 service to always start up with the server boots.

sudo systemctl stop apache2.service
sudo systemctl start apache2.service
sudo systemctl enable apache2.service

STEP 2: INSTALL MARIADB

NextCloud also requires a database server to function.. and MariaDB database server is a great place to start. To install it run the commands below.

sudo apt-get install mariadb-server mariadb-client

After installing, the commands below can be used to stop, start and enable MariaDB service to always start up when the server boots.

sudo systemctl stop mysql.service
sudo systemctl start mysql.service
sudo systemctl enable mysql.service
Note* if this command gets an error , please type

systemctl enable mariadb

After that, run the commands below to secure MariaDB server.

sudo mysql_secure_installation

When prompted, answer the questions below by following the guide.

Enter current password for root (enter for none): Just press the Enter
Set root password? [Y/n]: Y
New password: Enter password
Re-enter new password: Repeat password
Remove anonymous users? [Y/n]: Y
Disallow root login remotely? [Y/n]: Y
Remove test database and access to it? [Y/n]: Y
Reload privilege tables now? [Y/n]: Y

Restart MariaDB server

sudo systemctl restart mysql.service

STEP 3: INSTALL PHP 7.1 AND RELATED MODULES

PHP 7.2 isn’t available on Ubuntu default repositories… in order to install it, you will have to get it from third-party repositories.

Run the commands below to add the below third party repository to upgrade to PHP 7.2

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:ondrej/php

sudo apt-get update

For Ubuntu 18.04

sudo apt-get install php7.2 libapache2-mod-php7.2 php7.2-common libapache2-mod-php7.2 php7.2-mbstring php7.2-xmlrpc php7.2-soap php-apcu php-smbclient php7.2-ldap php-redis php7.2-gd php7.2-xml php7.2-intl php7.2-json php-imagick php7.2-mysql php7.2-cli php7.2-ldap php7.2-zip php7.2-curl

After install PHP 7.2, run the commands below to open PHP-FPM default file.

sudo nano /etc/php/7.2/apache2/php.ini

Then make the change the following lines below in the file and save.

file_uploads = On
allow_url_fopen = On
memory_limit = 256M
upload_max_file_size = 64M
max_execution_time = 360
date.timezone = America/Chicago

STEP 4: CREATE NEXTCLOUD DATABASE

Now that you’ve install all the packages that are required, continue below to start configuring the servers. First run the commands below to create NextCloud database.Run the commands below to logon to the database server. When prompted for a password, type the root password you created above.

sudo mysql -u root -p

Then create a database called nextcloud

CREATE DATABASE nextcloud;

Create a database user called nextclouduser with new password

CREATE USER 'nextclouduser'@'localhost' IDENTIFIED BY 'new_password';

Then grant the user full access to the database.

GRANT ALL ON nextcloud.* TO 'nextclouduser'@'localhost' IDENTIFIED BY 'user_password' WITH GRANT OPTION;

Finally, save your changes and exit.

FLUSH PRIVILEGES;
EXIT;

STEP 5: DOWNLOAD NEXTCLOUD LATEST RELEASE

Next, visit NextCloud site to download your free copy. The community edition is what you’ll want to download.

After downloading, run the commands below to extract the download file into Apache2 root directory.

cd /tmp && wget https://download.nextcloud.com/server/releases/nextcloud-13.0.2.zip
unzip nextcloud-13.0.2.zip
sudo mv nextcloud /var/www/html/nextcloud/

Then run the commands below to set the correct permissions for NextCloud to function.

sudo chown -R www-data:www-data /var/www/html/nextcloud/
sudo chmod -R 755 /var/www/html/nextcloud/

STEP 6: CONFIGURE APACHE2

Finally, configure Apahce2 site configuration file for NextCloud. This file will control how users access NextCloud content. Run the commands below to create a new configuration file called nextcloud.conf

sudo nano /etc/apache2/sites-available/nextcloud.conf

Then copy and paste the content below into the file and save it. Replace the highlighted line with your own domain name and directory root location.

ServerAdmin admin@gmail.com

DocumentRoot /var/www/html/nextcloud/

ServerName example.com

ServerAlias www.example.com

Alias /nextcloud "/var/www/html/nextcloud/"

Options +FollowSymlinks

AllowOverride All

Require all granted

Dav off

SetEnv HOME /var/www/html/nextcloud

SetEnv HTTP_HOME /var/www/html/nextcloud

ErrorLog ${APACHE_LOG_DIR}/error.log

CustomLog ${APACHE_LOG_DIR}/access.log combined

Save the file and exit.

STEP 7: ENABLE THE NEXTCLOUD AND REWRITE MODULE

After configuring the VirtualHost above, enable it by running the commands below

sudo a2ensite nextcloud.conf

sudo a2enmod rewrite
sudo a2enmod headers
sudo a2enmod env
sudo a2enmod dir
sudo a2enmod mime

STEP 8 : RESTART APACHE2

To load all the settings above, restart Apache2 by running the commands below.

sudo systemctl restart apache2.service

STEP 9 : BACKUP NEXTCLOUD

sudo apt-get rsync
sudo rsync -Aax /var/www/html/nextcloud/ /home/nextcloud/nextcloud-dirbkp_`date +"%Y%m%d"`/

STEP 10 : Mobile ,Desktop Clients

sudo add-apt-repository ppa:nextcloud-devs/client
sudo apt-get update
sudo apt-get install nextcloud-client

Summary:

Install next cloud

Insert security

Additional storage

Include federated data base

Cloud embedded based NanoPi NAS setup :)

Conclusions:

Cloud wide database is next cloud

HOCR2PDF - ExactCode-ExactImage in Linux(Fedora 1X)

2013-07-04T09:37:00.001-07:00

Introductions:

Hello folks ! once again, this tutorial is all about building special functions that could be used to process images:OCR, bar-code,grey-scaling and etc. Actually this guide should not be included in the techno-blog; but I was compromised to put the document here to avoid head ache experience again.It's been awhile since I've debugged the exact-image libraries so I've forgotten the "howtos" necessary for a quick set-up -not even worried about taking notes then. Just recently ,when I decided to upgrade my deployed OS into a newer version ,I didn't expect that it would take almost 3 days for me to compile those object modules and libraries-really a head ache . So this time, I've realized that it's not a good practice to ignore even a little pieces of notes (patches,revision,repositories and etc) in recalling included files patched in the program -especially if its free.

Anyway let me share to you the usefulness of the ExactCode software.The software is a fast, modern and generic image processing library .It includes codecs allowing library users to implement their own data sources and destinations, such as in memory locations or network transfers.It is know as viable alternative to ImageMagick. The software was prototyped the needed code in C++, just for speed, and achieved processing times about 1/20th of what ImageMagick consumed. It features explore several new algorithms, e.g. for de-screening, data-dependent triangulation scaling, loss-less JPEG transforms and others needed for fast image processing.

Below are the instructions on how you can install and build exactimage which includes programs for fast image processing.I've also attached video on how the OCR(hocr2pdf) program functions in searching different texts in a PDF viewer. You can use each program in the command line as I've written how-to's and instructions in the testing portion of this blog.You may cut and paste all included examples and see for yourself if it indeed does its job more than what is expected.But , hey,don't forget to jot some notes before you will forget its procedures.Otherwise you will experience headache in the future as you wanted to try it once more. A sort of advise folks!

Requirements:
Linux OS: Fedora 18 64 bit
Server ,i7 core
ExactCode image processing library
Cuneiform (installed)
Tesseract   (installed)

Methodology:

Download
root@localhost# wget http://exactcode.de/exact-image.0.8.x.tar.bz2
root@localhost# svn co https://exactcode.de/exact-image/trunk exact-image.8.x

Installations:

root@localhost# yum install
gcc gcc-c++ libstdc++
libXrender libXrender-devel
libaa libaa-devel
libX11 libX11-devel
agg agg-devel
freetype2 freetype2-devel
evas evas-devel
libjpeg libjpeg-devel
libtiff libtiff-devel
libpng libpng-devel
libungif libungif-devel
jasper   jasper-devel
expat expat-devel
openexr openexr-devel
lcms lcms-devel
barcode barcode-devel
swig swig-devel
lua lua-devel
perl perl-devel perl-ExtUtils-Embed
php php-devel
python python-devel
ruby   ruby-devel

root@localhost# tar -jxvf exact-image.8.x.tar.bz2
root@localhost# cd exact-image.8.x/
root@localhost# ./configure --prefix=/usr/local/scanner
root@localhost# make && make install

Testing:
Note:

This CLI based program can createa searchable PDF from hOCR input

hocr2pdf: Is a command line front-end for the image processing library to create perfectly layouted, searchable PDF files from hOCR, annotated HTML, input obtained from an OCR system.

(1) hOCR, annotated HTML, input must be provided to STDIN, and the image data is read using the filename from the -i or --input argument. For example:

roott@localhost# hocr2pdf -i scan.tiff -o test.pdf < cuneiform-out.hocr

(2) By default the text layer is hidden by the real image data. Including image data can be disabled via the -n, --no-image, so that just the recognized text from the OCR is visible - e.g. for debugging or to save storage space:

root@localhost# hocr2pdf -i scan.tiff -n -o test.pdf < cuneiform-out.hocr

(3) If too many gabs between letters in individual words as this might be a problem with imprecise OCR data or justified text with huge gabs. Hocr2pd in ExactImage includes a special mode activated with the command line argument -s, --sloppy-text, to group glyphs between whitespace to words which can help PDF viewers to produce better results while cut and pasting text:

root@localhost#hocr2pdf -i scan.tiff -s -o test.pdf < cuneiform-out.hocr

Details:

0) Exact-Image.8.8 files

(1)Plane image (Tiff file)

(2) hOCR generated text

3) Hocr2pdf script which is called every processing OCR

4) OCR searchable texts in PDF viewer

Remarks:
(1)Troubles:
png error [1]

Shooting:
Note: libpng12 in ExactImage depreciated and causes bug in the compilation so better delete "png.hh" and "png.cc"
root@localhost# cd /codecs
root@localhost# rm -rf png.*

(2)Troubles

/usr/bin/ld: cannot find -lXrender

Shooting

Note: locate the xrender files

root@localhost# locate Xrender
/usr/lib/libXrender.so.1
/usr/lib/libXrender.so.1.3.0
/usr/lib/vmware/lib/libXrender.so.1
/usr/lib/vmware/lib/libXrender.so.1/libXrender.so.1
/usr/lib/vmware-installer/1.1/lib/lib/libXrender.so.1
/usr/lib/vmware-installer/1.1/lib/lib/libXrender.so.1/libXrender.so.1

Note: As far as Linux is concerned, you do not have libXrender.so (even though you have libXrender.so.1 and libXrender.so.1.3.0).
This is easy to fix though. All you need is a symbolic link to the latest version.su to root (or use sudo if you prefer) and then

root@localhost#ln -s /usr/lib/libXrender.so.1.3.0 /usr/lib/libXrender.so

(3)Troubles
make: *** [objdir/frontends/optimize2bw] Error 1

Shooting

Adding “LDFLAGS += -lgif” to the Makefile fixes that.

Conclusions:

This open-source scanning software really share efforts in advancing OCR to produce readable and searchable text from a grabbed/captured images in any devices(as source).

Video(OCR processing)

Video/Media Streaming Server( MJPG-Streamer)

2013-06-26T21:58:00.003-07:00

Introductions:

Video Streaming is an awesome feature/s that you can add with your own published websites.Because viewing a remotely captured frame of images in real time is quite exciting configurations in your web server. Well, there are a lot of useful applications that technos can do with this tutorial/s; say, using the said application as home surveillance or monitoring households, remote sensing and data gathering with images and videos.The DIY guide of this blog would not require enthusiast for an expensive equipment(DVR and CAM grabber)-hence a simple web or IP camera will do the trick.I am telling you folks to go to CDR-King and buy for your selves the cheapest camera in town.

Yet personally, my sole aim is to put this web cameras on-board the machine ; from-thence I want to control stuffs remotely.I am practically concern of a DIY mobile robots.Since I've posted it in our FB PSCoE forum, its my pleasure to bring the set-up into details.It is somewhat a simple expectation and learning curve for advancement of "hobbying" about "internet of things". Wishing that in the near posts there would be more variety of designs involving online machine vision and image processing.

Perhaps , that could be a great challenge to tackle about setting-up a server that is capable of hosting online videos(live) to its clients.Here in our next techno-article we will explain ideas how this purpose would be achieved with free software available (of course for free) on the net.There are two software programs which have given online video streaming a seamless possibilities to geeks in the open source community.These are motion and mjpg-streamer, both run in the different flavour/distro of Linux/Unix OS.Yet for now, it will be our desire to use mjpg-streamer then motion will be discussed in the next techno-blog-How about that?

During the testing , we will try to use different viewer/player to remotely capture the videos ,either WAN or LAN streaming.This will happen using: Apache2 for web ,VideoLAN for local, and CLI command for shell frame monitoring. So without much further ado, lets try to do it now folks!

Requirements:
Linux OS: Ubunto/Fedora/CentOS (here I used Ubuntu 12.10v)
Two(2 ) or 3 Web Cameras
CPU core 2 duo /i7 (PC) or Raspberry PI (embedded)

Methodology:

Downloadable
mjpg-streamer download link

http://sourceforge.net/projects/mjpg-streamer/files/mjpg-streamer/Ubuntu%208.04%20packages/

Installations:
root@localhost# apt-get install subversion libv4l-dev libjpeg8-dev
root@localhost# apt-get install imagemagick fswebcam
root@localhost# apt-get install apache2 php php-devel

1) You can install and compile mjpg-streamer from the source
root@localhost# svn co https://mjpg-streamer.svn.sourceforge.net/svnroot/mjpg-streamer mjpg-streamer

root@localhost# cd mjpg-streamer/mjpg-streamer
root@localhost# make USE_LIBV4L2=true clean all
root@localhost# sudo make DESTDIR=/usr install
root@localhost# cd ../..
root@localhost# rm -rf mjpg-streamer

2) Installation done using apt-get and opening it with software application launcher
root@localhost# apt-get install mjpg-streamer

Configurations (for device and ports)

(1)check the available video camera (web/IP ,etc)
root@localhost# ls -lst /dev/video*

(2)check if its detected by your pC
root@localhost# lspci

(3) check if it has driver /brand in linux
root@localhost # lsusb

(4) check specs and parameters
root@localhost# dmesg

Testing
1) Test If cameras are streaming
root@localhost# sudo fswebcam --verbose
--- Opening /dev/video0...
Trying source module v4l2...
/dev/video0 opened.

src_v4l2_set_pix_format,541: Device offers the following V4L2 pixel formats:
src_v4l2_set_pix_format,554: 0: [0x56595559] 'YUYV' (YUV 4:2:2 (YUYV))
src_v4l2_set_pix_format,554: 1: [0x47504A4D] 'MJPG' (MJPEG)
Using palette MJPEG

2) Doing the streaming by assigning input(video file ,device camera,resolution,frame and output(web,localhost,etc)
root@localhost# mjpg_streamer -i "/usr/lib/input_uvc.so -d /dev/video0 -f 60 -r 960x720" -o "output_http.so -p 8085 -n"

2) Browse the video streaming over http
2.1) browse it on the web for streaming
http://localhost:8085?action=stream

2.2) browse it on the web for snapshot
http://localhost:8085?action=snapshot

3) Here are the commands to be included in the script/s to stop and start the mjpg-streamer applications
3.1) To start the application
root@localhost# mjpg_streamer -b -i "/usr/lib/input_uvc.so -d /dev/video0" -o "/usr/lib/output_http.so -p 8085 -w /var/www/mjpg_streamer -n"

3.2) To stop the application
root@localhost# killall mjpg_streamer

3.3) To restart the application
root@localhost# killall mjpg_streamer
root@localhost# mjpg_streamer -b -i "/usr/lib/input_uvc.so -d /dev/video0" -o "/usr/lib/output_http.so -p 8085 -w /var/www/mjpg_streamer -n"

Details:

1) MJPG-streamer download site

2) Opening mjpg-streamer in a launcher software application

3) Typo Error 94.1 version

4) Corrections for typo error : 94_r1 to 94.1 (version)

5) localhost with port video streaming

6) Video Lan for video streaming

7) Web video streaming with html script and apache2

8) HTML simple web script for publishing two videos

9) Video streaming multi-camera (just two for my spare)

Remarks:

(1)Troubles

The description of the package version does not comply with the "Center of applications." So we need to rebuild the package to solve it.

Shooting(a)
1.1) Download the latest build mjpg-streamer_r94-1_i386.deb

1.2) Renaming it mjpg-streamer.deb

1.3) Put in the root of your user directory "tmpdir".

root@localhost# mkdir tmpdir

root@localhost# mv mjpg-streamer_r94-1_i386.deb mjpg-streamer.deb

-->

root@localhost# dpkg-deb -x mjpg-streamer.deb tmpdir
root@localhost# dpkg-deb -control mjpg-streamer.deb tmpdir/DEBIAN

1.4) Now in any text editor change the version number in the file tmpdir/DEBIAN/control with r94-1 at 94.1

root@localhost# nano tmpdir/DEBIAN/control

root@localhost# dpkg -b tmpdir mjpeg-streamer_my.deb

1.5) mjpeg-streamer_my.deb is now ready to install.

Shootin(b)
1.6) Open the file mjpg-streamer_r94-1_i386.deb and extract it
1.7) Search and edit the file "DEBIAN/control
1.8) change the text version DEBIAN/control with r94-1 at 94.1
1.9) Open it with Ubuntu application launcher

(2) Troubles

input_uvc.so: cannot open shared object file: No such file or directory

MJPG Streamer Version.: 2.0
ERROR: could not find input plugin
       Perhaps you want to adjust the search path with:
       # export LD_LIBRARY_PATH=/path/to/plugin/folder
       dlopen: input_uvc.so: cannot open shared object

        file: No such file or directory

Shooting

2.1) locate "input_uvc.so"

root@localhost# which input_uvc.so

2.2) Install uvc object

root@localhost# sudo apt-get install input_uvc.so

3) Troubles:
Can't display the mjpg-streaming though it streams frame of images

Shooting
mjpg_streamer -i "/usr/lib/input_uvc.so -d /dev/video0 -f 60 -r 960x720" -o "output_http.so -p 58180 -n"

Conclusions:
Completed an on-line video/media server, and is now ready to use for a mobile robots

e-Learning :Moodle Linux Server setup

2011-12-07T19:58:00.002-08:00

Introductions:

Hello Technos!

This would be a great learning stuffs for you to have an on-line learning website

Requirements:
Software:
moodle 2.2

mysql

php
apache2

Hardware:
Server CPU (Optiplex 755 QCore )

Objectives:
To test moodle software
To deploy e-learning website

Methodology:
1) Install softwares:
root@localhost# yum install httpd*
root@localhost# yum install php*
root@localhost# yum install mysql*
root@localhost# wget htp://
root@localhost# cp moodle-latest-2.2.tar.gz /var/www/

2) configure Apache2
root@localhost# vim /etc/httpd/conf/httpd.conf

2.a) Add the following php settings:
2.a.1)Module

# Use for PHP 5.x:
LoadModule php5_module modules/libphp5.so
AddHandler php5-script .php 
2.a2) Index format

# Add index.php to your DirectoryIndex line:
DirectoryIndex index.html index.php
AddType text/html .php
# PHP Syntax Coloring
# (optional but useful for reading PHP source for debugging):
AddType application/x-httpd-php-source phps

2.a3) PHP File handling

2.b) Add/change the following web directories:
DocumentRoot /var/www/html

Document Root "/var/www/moodle"

3) conffigure php
root@localhost# vi /etc/php.ini
3.a)
Add the following entries:
extension=mysql.so
extension=gd.so
memory_limit=40M
post_max_size = 80M
upload_max_filisize=80M

4) configure mysql
4.a) If its your first time to open mysql
root@localhost# mysqladmin -u root -p yourpassword
root@localhost# mysql -u root -p

4.b) Edit my.cnf , use unicode (UTF-8 format)
root@localhost# vim /etc/my.cnf
Add the following entries
[client]
default-character-set=utf8
[mysqld]
default-character-set=utf8
default-collation=utf8_unicode_ci
character-set-server=utf8
collation-server=utf8_unicode_ci

4.c)create database for moodle
root@localhost# mysql> create database moodle;
root@localhost# mysql > exit;

5) installing the moodle software
5.a)Let us disable secure linux for a while so that apache is able to create directory
via webpage
root@localhost# echo 0 >/selinux/enforce
root@localhost# chown -R apache:apache/var/www/
root@localhost# chown -R apache:apache/var/www/moodle
root@localhost# cd /var/www/
root@localhost# tar -zxvf moodle-latest.tar.gz

5.b) browse http://localhost/
browse http://ip_address

Below are the pictures details:
Details(0)

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Details(2)

Details(3)

Details(4)

Details(5)

Details(6)

Details(7)

Details(8)

Details(9)

Remarks:

Problem 1:

Web page cannot create a (/var/www/moodledata ) directory
Solution 1: (off security linux for a while)
set off selinux

Solution 2: (enable web directory writability)
chown 777 /var/www/

Solution 3: (apache ownership of the file [permission])
chown -R apache:apache /var/www/
chown -R apache:apache /var/www/moodle
chown -R apache:apache /var/www/moodledata

Problem 2:

Cannot load mysql for UTF-8 unicode format

Solution 1:(mysql configuration)
edit /etc/my.cnf

Solution 2: (brute force mysql for setting utf-8)

Problem 3:

SELinux is preventing /usr/sbin/httpd from write access on the directory /var/www/moodledata.

Plugin: catchall
you want to allow httpd to have write access on the moodledata directoryIf you believe that httpd should be allowed write access on the moodledata directory by default.
You should report this as a bug.
You can generate a local policy module to allow this access.
Allow this access for now by executing:
root@localhost# grep httpd /var/log/audit/audit.log | audit2allow -M mypol
root@localhost# semodule -i mypol.p

Conclusions:

EMC PowerPath for multipath I/O

2011-07-03T20:43:00.000-07:00

Overview

Multipath I/O is a fault-tolerance and performance enhancement technique in computer storage area networks, whereby there is more than one physical path between the CPU in a computer storage system. The physical multipath is through the buses, controllers, switches, and bridge devices connecting the mass storage.

Introduction
Data Center Scenario:

In our Main library data center environment, the same expectation of high system’s availability must be assured to minimize downtime and cutting mean time between failures (MTBF) on its 24x7 operations.Hence, the application services such as: e-lib, ilib, repository and kiosks that are link in a storage area networks required a set up of multiple redundant data paths (multipath) between a host servers and storage systems to avoid interruptions in data flow and anticipation if ever unexpected hardware failure occur. To manage a multipath I/O configuration, IT administrators should ensure that the server OS supports multipath I/O and is configured properly to access data from the storage system and fail over to secondary data paths when necessary.

Technology Implementation:

Our simple implementation of multipathing is using Dell EMC-500X which is connected to two Fibre Channel ports (FC1 -considered the fastest network carrier for large amounts of information) and the rest are physical path components, adapters, cables, and switches — to create logical paths between the server and the storage device. A network interface card (in the iSCSI case) or HBA should be connected by using redundant switch infrastructures to provide continued access to storage in the event of a failure in a storage fabric component. Should one controller, port or switch fail, causing the path to fail, multipathing logic uses an alternate path for I/O so that applications can still access their data. On the other hand the operating system can route I/O through the remaining controller transparently to the application, with no changes visible to the applications, other than perhaps incremental latency.

Option to Multipathing I/O:

There are two Linux multipath I/O available EMC PowerPath and DM multipath though both have each pros and cons; we preferred EMC Powerpath for a variety of ideal and practical reasons. Provide viable and robust multipath I/O capability for Linux operating systems on Dell PowerEdge servers and Dell/EMC storage systems. This multipath software layers can leverage the redundant paths to provide performance enhancing features, such as:

• Traffic shaping
• Automatic path management
• Dynamic reconfiguration
• Round-robin, adaptive failover
• Basic to advance automatic path failover
• Online recovery
• Supports heterogeneous OS(Windows®, Linux, UNIX®, and Novell NetWare))

PowerPath features:

PowerPath does not use a configuration file but rather it comes with its own init script and can be started and stopped from the command line. However, PowerPath relies on how the HBA driver has detected the LUN and created the block devices, and does not use an administrator-supplied configuration file; its enumeration of LUNs can vary from one node to the next in clustered servers. As with DM multipath, the configurations of the following block devices: /dev/sdb, /dev/sdc, /dev/sdd, and /dev/sde are all bundled to /dev/emcpowera. And once started, PowerPath gathers the UUIDs of the block devices and bundles the devices with the same UUID into a single device, /dev/emcpowerX. As PowerPath identifies the LUNs, it enumerates them as /dev/emcpowera, /dev/emcpowerb, and so on.

PowerPath Operations:

The PowerPath, administrators must stop all I/Os to the devices and unmount them just to confirm that all of the /dev/emcpowerX devices are not in use before issuing the command service PowerPath stop. This device can be partitioned, formatted with a file system, and mounted using the following cli commands: fdisk, mke2fs, mkdir and mount.

Powerpath Utilities:

The software features includes powermt, a powerful management utility for its devices. Its man page (man powermt) provides specific information about the utility. After installation, administrators can start PowerPath by issuing the command service PowerPath start. When stopping PowerPath, administrators should be sure that there is no I/O activity— that is, PowerPath should not be in use by any application. Other features of powermt is allowing administrators to display the current settings; set priority, policy (algorithms), and mode; remove a particular HBA or device; and restore a removed HBA or device.

Requriments:

OS : Centos 64 bit
DELL Servers
FC1 card controller

Fiber Optic Network cables
Lan Networks

Objectives:
To implement Powerpath in a Unix/Linux like platform
To implement EMC-Linux-5-1-0.194.rhel5.i386.rpm in an Intel 64 bit CPU architecture

Methodology:

Steps to make File Systems on Red hat Linux connected to EMC .To prepare the system and install PowerPath, follow these steps:

Below is the screenshot of the EMC PowerPath software’s availability; you may choose which version suits to your hardware architecture

EMCpower.LINUX-5.1.0-194.rhel5.i386.rpm (Intel chip 64 bit CPU architecture)

Step 1:
Set up the system for boot over SRP (SCSI remote Protocol-transferring and commands and data ->modprobe). When the system can boot over SRP, proceed with the steps below to get the system boot over PowerPath. First install below mentioned rpms:

1) EMCpower.LINUX-5.1.0-194.rhel.i386.rpm
2) Naviagentcli.noarch.rpm

[root@db1 ~]# rpm –ivh “rpm name”

root@db1 ~]# rpm -ivh EMCpower.LINUX-5.1.0-194.rhel.x86_64.rpm

[root@db1 ~]# rpm -ivh naviagentcli.noarch.rpm
Start two service mentioned below
[root@db1 ~]# /PATH_EMC/ service PowerPath start
[root@db1 ~]# /PATH_EMC/ service naviagent start
[root@db1 ~]# /etc/init.d/PowerPath start

Starting PowerPath:
done
[root@db1 ~]#

Step 2:

Edit the file /etc/redhat-release and put in the single line
[root@db1 ~]# Starting PowerPath: This package requires RedHat RHEL5."
Red Hat Enterprise Linux Server release 5 (Number of Powerpath version) so that the system is now identifying itself as a RHEL machine.

[root@db1 ~]# cd /etc
[root@db1 ~]# vi rhel5-x86_64

Change the Linux OS release version into the corresponding version of EMCpower.LINUX-5.1.0-
194.rhel.x86_64.rpm

Step 3:
Install PowerPath on the system. Follow the usual EMC PowerPath installation procedure to install PowerPath.

[root@db1 ~]# emcpreg -install (register powerpath)

This will ask you the key.

Please check this key installed on other server connected with EMC by cli command

[root@db1 ~]# emcpreg –list command

This will install key

Check that EMC path is now available or not by a cli command

[root@db1 ~]# cat /proc/partitions

You should see sd* devices in list, if not then reboot server

Step 4:
After PowerPath is installed properly and started, enter the fdisk -l command. You should see output similar to the example below. In this case, only one LUN is assigned to this host, and the LUN is partitioned accordingly.

[root@db1 ~]# fdisk -l

PowerPath is now up and running. The emcpowera* shows the PowerPath pseudo devices.

Step 5:
Creation of file system (Please skip or ignore this steps if it doesn’t support GPT use GNU parted instead)

This will temporarily mount FS
[root@db1 ~]# cat /proc/partitions

[root@db1 ~]# fdisk /dev/emcpowera

[root@db1 ~]# partprobe
[root@db1 ~]# pvcreate /dev/emcpowera1

32M is Physical extend

VOLUME_GROUP is volume group name
[root@db1 ~]# vgcreate -s 32M VOLUME_GROUP /dev/emcpowera1 204800 is size of file system that is 200(GB)*1024
[root@db1 ~]# lvcreate -L 204800M -n EMC /dev/VOLUME_GROUP
Mkfs.ext3 is used to convert the FS in ext3
[root@db1 ~]# mkfs.ext3 /dev/VOLUME_GROUP/EMC

Create mount point e.g. mysql on /
[root@db1 ~]# mount /dev/VOLUME_GROUP/EMC /mysql

Step 6:
Permanent mounting
[root@db1 ~]# edit /etc/fstab
[root@db1 ~]# cd /etc
[root@db1 ~]# vi fstab

/dev/emcpowera1 /emc ext3 auto, nouser, exec

Above entry in fstab will be active on reboot.

Reboot server

Check that FS “emc” is available by
[root@db1 ~]# df –h rw, sync

Step 7:
Testing mysql file copied to PowerPath

[root@db1 ~]# mount /dev/emcpowera1 /mnt/emc/

[root@db1 ~]# mkdir /mnt/emc/mysql
[root@db1 ~]# service mysqld stop
[root@db1 ~]# cp -R /usr/local/mysql/var /mnt/emc/mysql/

Step 8:
Proceed to EMC PowerPath productions.

Details:(1) LUN clustered configuration owned by SPA

Details(2):Basicj highly available SAN configuration with a LUN owned by SPA

EMC PowerPath Remarks:

After the evaluation of the requirements of implementing our storage area networks- multipathing, it is a clever option to proceeds on EMC powerpath features for a various supported reason. Based on our technical experience about practically and simplicity of usage we had dealt it greatly using EMC PowerPath.

Conclusions:

Successful deployment of EMC Power Path(Linux Version )

Note:**
1)Please contact the author(by e-mail) with regards to any set-up deployment/development plan.

2) Reference uses Dell Multipath/Powerpath articles

Thanks!

E^3
Author

Mysql Workbench Setup (Fedora 64 bit)

2011-05-26T02:03:00.000-07:00

Introductions:

MySQL Workbench is a GUI database design tool that integrates SQL development, administration, database design, creation and maintenance into a single development environment for the database system of MySQL.It is a C/C++ program ,running in a multi-platform OS . The Software is now currently owned by Oracle yet most of its bundles are still available freely in the Open-source community.For further references please go to this wiki: http://en.wikipedia.org/wiki/MySQL_Workbench

Hey, I guess am seriously focusing myself into an information system of business data processing.Just recently when I got involved on using SQL and the combined front end software(PHP,PERL,Python,Gambas and etc.).But for now, this workbench is for sure a great help to simplify databasing scheme.

Anyway, sooner or later l'll stick to some of my own coding applications from basic ,average and might as well into wizardness-huh?

Then let's go coding...

Requirements:
Here are some important packages:
libzip-0.9.3-2.fc13.x86_64
python-paramiko.noarch 0:1.7.6-2.fc14
python-paramiko-1.7.6-2.fc14.noarch.rpm

For complete requirements(cut and paste then try it with "yum"):
mysql++-devel.x86_64 0:3.1.0-2.fc14
mysql-bench.x86_64 0:5.1.51-2.fc14
mysql-connector-c++-devel.x86_64 0:1.1.0-0.2.bzr888.fc14
mysql-devel.x86_64 0:5.1.51-2.fc14
mysql-embedded-devel.x86_64 0:5.1.51-2.fc14
mysql-server.x86_64 0:5.1.51-2.fc14
mysql-test.x86_64 0:5.1.51-2.fc14
mysql-workbench-gpl.x86_64 0:5.2.34-1fc14
mysqltuner.noarch 0:1.1.1-1.fc13
mysqludf_xql.x86_64 0:1.0.0-1.fc13

Objectives:

1*)Our objective is to simplify Mysql Database application with the aid of its bundled tools-Mysql Workbench

Methodology:

root@localhost# yum install libzip

root@localhost# yum install perpect

root@localhost# yum install python-paramiko

root@localhost# yum install mysql mysql-server

Install MySql source code
root@localhost# groupadd mysql
root@localhost# useradd -r -g mysql mysql
root@localhost# cd /usr/local
root@localhost# tar zxvf /path/to/mysql-VERSION-OS.tar.gz
root@localhost# ln -s full-path-to-mysql-VERSION-OS mysql
root@localhost# cd mysql
root@localhost# chown -R mysql .
root@localhost# chgrp -R mysql .
root@localhost# scripts/mysql_install_db --user=mysql
root@localhost# chown -R root .
root@localhost# chown -R mysql data

You can have the Mysql configuration optional
root@localhost# cp support-files/my-medium.cnf /etc/my.cnf
root@localhost# bin/mysqld_safe --user=mysql &
root@localhots# cp support-files/mysql.server /etc/init.d/mysql.server

Then check if MyQL is installed:
Note: What we're talking here is a default username and password just to check
mysql is running.You should see where MySql is,and start running its daemon, so here is how to do it..

root@localhost# whereis mysql
root@localhost# cd /usr/local/mysql
root@localhost# ./bin/mysqld_safe &

Open another tab and then go to the same path "/usr/local/mysql/" take note "./bin/mysql" (the dot for mysql/bin).Or to have a soft link to the executable path "/usr/bin/mysql)-that could be a better idea ..you know bro.
root@localhost# ./mysql
root@localhost# ln -s /usr/local/bin/mysql /usr/bin/mysql
root@localhots# mysql
"Bingo!!"

Then proceed to Mysql Workbench
root@localhost# rpm -ivh mysql-workbench-gpl-5.2.34-1fc14.x86_64.rpm

Then goto File->Programming -> Mysql Workbench

Detail(1) Go to the Mysql Download Area

Detail(2) Choose mirror site for download

Detail(3) Downloaded myql work bench

Detail(4) CLI: rpm -ivh mysql-workbench

Detail(5) Run your first installed Mysql-Work bench

Detail (6) Open Mysql work bench connection

Detail(7) A new connection is established

Detail(8) Open Query

Detail(9) Add new table

Remarks:
For some troubles that might occur

1) Permission Denied
Trouble: chown: cannot access `./.gvfs': Permission denied
Solution: chown -R $USERNAME:$USERNAME $HOME

My SQL saga is just beginning..

Conclusions:
Simply Mysql tools

RoBook Scanner Software (Beta Release)

2011-05-04T21:26:00.000-07:00

Introductions:

The initial effort to informally published a RoBook Scanner software engineering program will just tackle minimal infos.The purpose of this techno blog is a sort of an article for a reader to gain an idea.Idea that really means "pinoy can do it" ,due to some confidentiality of the project ,it is less expected to pull out the whole detail ; yet its explanations therein would be sufficient enough to deal what RoBook Scanner is all about.

The Author is hoping that in a given time 'if given an authority for publishing such systematic idea without hesitant it will be blogged with full detail -clearly and free to the public.But this time as the date of writings just simple documentation is sufficient to depict the contents of this article.

In some ways, this could be another fruitful sharing of thoughts for all of us-I wish that.

Hmmmn, anyway, the software now has done almost its features and the test is how can it be ported to different Linux flavour.So here is what I did for the software package installer .

Requirements:
Need to assure these are available or installed in your OS
Autoconf
Automake
Makepkg
Tar
deb helper

Objectives:
Compile a package installer
1) In Fedora
2) In CentOS
3) In debian/Ubunto

Methodology:

Detail(0) At last..RoBook Scanner Software (Beta )

Detail(1)Package information

Detail(2)Changelog

Detail(3)Target distributions

Detail(4)Package group

Detail(5)Destination directory

Detail(6)Creating the package

Detail(7)A bundle of installer ready for deployment

Remarks:

Conclusions:

SVN repository on Apple Xserve

2011-03-11T04:35:00.000-08:00

Introductions:

Whew! How about that ? Well, it seems that it is going to build the application from scratch .Yes, my friend , this is a sort of little story how will you compile libraries and patched in a UNIX like OSX,oh a pain and tasky. I 've done this almost a year ago, but that's only for Linux/Unix like OS (say Fedora or CentOS); but now a little porting of compiling package in UNIX/OSX

Objectives:
To install Repository in MAC Xserve (period!);with yum ,sudo apt-get and fink(why??)

Requirements:
Note:
All the packages were stored at an "installer" named directory
apr-1.4.2.tar.gz
httpd-2.2.17.tar.gz
subversion-1.6.15.tar.gz
apr-util-1.3.10.tar.gz
libtool-2.2.tar.gz
subversion-1.6.16.tar.gz
autoconf-2.68.tar.gz
m4-1.4.tar.gz
db-5.1.25.tar.gz
neon-0.29.5.tar.gz
expat-2.0.1.tar.gz
php-5.3.5.tar.gz
zlib-1.2.5.tar.gz
sqlite-autoconf-3070500.tar.gz

Only fink help in a little while
yum-3.2.29.tar.gz
wget-1.9.tar.gz
fink-0.29.19.tar.gz

Methodology:
Basic Instructions:
1) Download all of those files mentioned above
2) Install and compile
3) debug with --prefixes

[autoconf]
root@localhost# curl -L -O http://ftp.gnu.org/gnu/autoconf/autoconf-2.68.tar.gz
root@localhos# tar -zxvf autoconf-2.68.tar.gz
root@localhost# cd autoconf-1.2.8
root@localhost# ./configure
root@localhost# make && make install

[BerkerlelyDB]
root@localhost# curl -L -O http://ftp.riken.go.jp/pub/FreeBSD/distfiles/bdb/db-5.1.25.tar.gz
root@localhos# tar -zzxvf db-5.1.25.tar.gz
root@localhost# cd db-5.1.25
root@localhost# cd build_unix
root@localhost# ../dist/configure --prefix=/usr/local/db5
root@localhost# make && make install

[libtool]
root@localhost# curl -L -O http://ftp.gnu.org/gnu/libtool/libtool-2.2.10.tar.gz
root@localhost# tar -zxvf libtool-2.2.tar.gz
root@localhost# cd libtool-2.2.10
root@localhost# ./configure
root@localhost# make && make install

[expat]
root@localhost# curl -L -O http://nchc.dl.sourceforge.net/project/expat/expat/2.0.1/expat-2.0.1.tar.gz
root@localhost# tar -zxvf expat-2.0.1.tar.gz
root@localhost# cd expat-2.0.1
root@localhost# ./configure --prefix=/usr/local/expat
root@localhost# make && make install

[neon]
root@localhost# curl -L -O http://webdav.org/neon/neon-0.29.5.tar.gz
root@localhost# tar -zxvf expat-2.0.1.tar.gz
root@localhost# cd expat-2.0.1
root@localhost# ./configure --prefix=/usr/local/neon
root@localhost# make && make install

[zlib]
root@localhost# curl -L -O http://zlib.net/zlib-1.2.5.tar.gz
root@localhost# tar -zxvf zlib-1.2.5.tar.gz
root@localhost# cd zlib-1.2.5
root@localhost# ./configure --prefix=/usr/local/zlib
root@localhost# make && make install

[sqlite]
root@localhost# curl -L -O http://www.sqlite.org/sqlite-autoconf-3070500.tar.gz
root@localhost# tar -zxvf sqlite-autoconf-3070500.tar.gz
root@localhost# cd sqlite-autoconf-3070500
root@localhost# ./configure --prefix=/usr/local/sqlite
root@localhost# make && make install

[apr]
root@localhost# curl -L -O http://download.filehat.com/apache//apr/apr-1.4.2.tar.gz
root@localhost# tar -zxvf apr-1.4.2.tar.gz
root@localhost# cd apr-1.4.2
root@localhost# ./configure --prefix=/usr/local/apr
root@localhost# make && make install

[apr-util]
root@localhost# curl -L -O http://ftp.wayne.edu/apache//apr/apr-1.4.2.tar.gz
root@localhost# tar -zxvf apr-util-1.3.10.tar.gz
root@localhost# cd apr-util-1.3.10
root@localhost# ./configure --prefix=/usr/local/apr-util-1.3.10
root@localhost# make && make install

[mysql]
root@localhost# tar -zxvf mysql-5.xy.tar.gz
root@localhost# cd mysql-5.x.y
root@localhost# ./configure --prefix=/usr/local/mysql
root@localhost# make && make install

[gettext]
root@localhost# sudo su
root@localhost# curl -L -O ftp://ftp.gnu.org/gnu/gettext/gettext-0.17.tar.gz
root@localhost# tar xvzf gettext-0.17.tar.gz
root@localhost# cd gettext-0.17
root@localhost# cd gettext-tools/
root@localhost# ./configure --prefix=gettext
root@localhost# make
root@localhost# make install

[gdbm]
root@localhost# curl -L -O http://savory.googlecode.com/files/gdbm-1.8.3.tar.gz
root@localhost# tar -zxvf gdbm-1.8.3.tar.gz
root@localhost# cd gdbm-18.3
root@localhost# ./configure --prefix=/usr/local/gdbm
root@localhost# make && make install

[Apache]
root@localhost# curl -L -O http://www.ecoficial.com/apachemirror//httpd/httpd-2.2.17.tar.gz
root@localhost# tar -zxvf httpd-2.2.17.tar.gz
root@localhost# cd httpd-2.2.17
root@localhost# ./configure --prefix=/usr/local/apache2 -with-apxs=/usr/local/apache2/bin/apxs --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util --with-zlib=/usr/local/zlib --with-mysql=/usr/local/mysql/ --with-sqlite=/usr/local/sqlite --enable-dav --enable-so --enable-cgi --enable-info --enable-rewrite --enable-speling --enable-usertrack –with-dbm=db5 –with-berkeley-db=/usr/local/db5 --enable-deflate --enable-ssl
root@localhost# make && make install

Browse and test : http://localhost , then you should see the immortal..It Works!

[Subversion]
root@locahost# tar-zxvf subversion-1.6.16.tar.gz
root@localhost# cd subversion-1.6.16
root@localhost@ ./configure --prefix=/usr/local/svn --with-apxs=/usr/local/apache2/bin/apxs --with-apr=/usr/local/apr/bin/apr-1-config --with-apr-util=/usr/local/apr-util/bin/apu-1-config --disable-neon-version-check --with-neon=/usr/local/neon --with-sqlite=/usr/local/sqlite --with-zlib=/usr/local/zlib

[I]Correct path of SVN repository
root@locahost # chown -R daemon:daemon /usr/local/svn
root@localhost# svnadmin create datacenter

[II] Create a username and password stored in a txt file
root@localhost# mkdir /usr/local/password
root@locahost# cd /usr/local/password
root@localhost# httpswd -cm /usr/local/password/secret admin
root@localhost# enter a new password: "password"

[III]Config Apache now to access SVN services!
root@locahost# vim /usr/local/apache2/conf/http.conf
1) Add the following lines
1.a) to load dav modules
LoadModule dav_svn_module modules/mod_dav_svn.so
LoadModule authz_svn_module modules/mod_authz_svn.so
LoadModule php5_module modules/libphp5.so
DeflateFilterNote Input instream
DeflateFilterNote Output outstream
DeflateFilterNote Ratio ratio

1.b) to add location of SVN path with authentications
#
DAV svn
SVNPath /usr/local/svn/datacenter
AuthType Basic
AuthName "Subversion Repository"
AuthUserFile /usr/local/password/secret
Require valid-user
SetOutputFilter DEFLATE
SetInputFilter DEFLATE
#
root@locahost# cd /usr/local/apache2/bin/
root@locahost# ./apachectl restart

Browse and check : http://localhost/svn/datacenter then enter a user-name and password.

[Php]
root@localhost# curl -L -O http://ar.php.net/distributions/php-5.3.5.tar.gz
root@localhost# tar -zxvf php-5.3.5.tar.gz
root@localhost# cd php-5.3.5
root@localhost# ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql=/usr/local/mysql --with-mysqli --prefix=/usr/local/php --with-config-file-path=/usr/local/php --enable-force-cgi-redirect --disable-cgi --with-zlib --with-gdbm=/usr/local/gdbm
root@localhost# make
root@localhost make test
root@localhost# make install

Remarks:
Hints:
Problem : Forbidden Error
Solution:
1.0) Do it always in README
2.0) If ever forbidden error (404,405,400,etc) occurs
2.a) take note the ownership of the /usr/local/svn (directory)
root@localhost# chown -R daemon:daemon /usr/local/svn
root@localhost# ls -alt
Then you should see ownership of the file

Solution:
2.b) check the apahce ownership!
Username daemon
Usergoup daemon

Solution:
2.c) Try to edit the
SVNPath not SVNParentPAth

2.d) and also don't forget to memorize your password
mkdir /usr/local/password
vim secret , then save
htppasswd -cm /usr/local/password/secret

In installing Subversion

Problem: "/usr/bin/ld: cannot find -lexpat "
Solution: download and install expat

Problem: configure: error: Cannot find libmysqlclient under /usr.
Note that the MySQL client library is not bundled anymore!
Note:
This happen because , we directly Yum installed mysql yet PHP now needs the complete path of MySQL- grrrr!

1) Be sure to download the mysql libraries and add ons:
mysql devel,mysql-php,libmysql

2) Use again "whereis"
root@localhost# cd /usr/local/php-5.version.xx
root@localhost# whereis mysql

Then use --with-mysql=/usr/bin/mysql libdir=lib64
root@locahost# ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql=/usr/bin/mysql --with-libdir=lib64 --with-mysqli=/usr/bin/mysql_config --prefix=/usr/local/php --with-config-file-path=/usr/local/php --disable-cgi --with-zlib --with-gdbm
..and Yahoo it saves the day...

Conclusions:
Somehow it is always possible!

Decapod for RoBook Scanner(Phase II)

2011-03-03T17:40:00.000-08:00

Introductions:

Welcome back brethren,here once again we'll re figure out the application of Decapod.Its been a long time since the team had paused their development,and I cant wait to tweak the current version simply because most of the program flavor or add-ons are changing so quick .Through these, I needed to recompile Decapod for a chance to enhance its application to its changing flavors(add-ons).

Objectives:
Recompile /install Decapod with its new release add-ons
Debugging a Decapod scripts
Debugging the Decapod source code

Requirements:
sudo apt-get install

libaa1                           ascii art library 
libc6                             Embedded GNU C Library: Shared lib
libcdk5                         C-based curses widget library
libexif12                       library to parse EXIF files
libgphoto2-2                 gphoto2 digital camera library 
libgphoto2-port0          gphoto2 digital camera port library 
libjpeg62                      The Independent JPEG Group's JPEG 
libncurses5                  shared libraries for terminal hand 
libpopt0                        lib for parsing cmdline parameters
libreadline5                  GNU readline and history libraries

Note : These are the release packages available as the date of writings; other libraries are also with their latest version
Decapod verion. 4.0
libgphoto2 version 10.1
gphoto2-10 version
Ocropus packages:
openfst-1.2.7.tar.gz
iulib-0.4.tgz

Methodology:
Download and Install
Re evaluate the integration of a new compiled Decapod
Test Cameras

root@localhost# sudo apt-get remove libgphoto2-*
root@localhost# sudo apt-get remove gphoto2
root@localhost# sudo apt-get install build-essential
root#localhost# sudo apt-get sudo apt-get install libpopt* libexif*

#for libgphoto2
root@localhost# wget http://sourceforge.net/projects/gphoto/files/libgphoto/2.4.10.1/libgphoto2-2.4.10.1.tar.gz
root@localhost# tar -xvf libgphoto2-2.4.10.1.tar.gz
root@localhost# cd libgphoto2-2.4.10.1/
root@localhost# ./configure
root@localhost# make
root@localhost# sudo make install
root@localhost# cd ..
root@localhost# rm -Rf libgphoto2-2.4.10.1/

# for gphoto2

wget http://sourceforge.net/projects/gphoto/files/gphoto/2.4.10/gphoto2-2.4.10.tar.gz
tar -zxvf gphoto2-2.4.10.tar.gz
cd gphoto2-2.4.10/
./configure
make
sudo make install
cd ..
rm -Rf gphoto2-2.4.10/
rm -f gphoto2-2.4.10.tar.bz2

1)A basic OCRopus installations
root@localhost# hg clone $release https://iulib.googlecode.com/hg/ iulib
root@localhost# hg clone $release https://ocropus.googlecode.com/hg/ ocropus
root@localhost# hg clone $release https://ocroswig.ocropus.googlecode.com/hg/ ocroswig
root@localhost# hg clone $release https://ocropy.ocropus.googlecode.com/hg/ ocropy
root@localhost$# wget -nd http://openfst.cs.nyu.edu/twiki/pub/FST/FstDownload/openfst-1.2.7.tar.gz openfst-1.2.7.tar.gz
root@localhost# hg clone $release https://pyopenfst.googlecode.com/hg/ pyopenfst
date;

2)Or,from Decapod-4.0 package modify "decapod-ocropus.sh" script to replace contents from line 56 to bottom

clone_and_install_ocropus_lib https://iulib.googlecode.com/hg/ iulib
clone_and_install_ocropus_lib https://ocropus.googlecode.com/hg/ ocropus
download_and_install http://openfst.cs.nyu.edu/twiki/pub/FST/FstDownload/openfst-1.2.7.tar.gz openfst-1.2.7.tar.gz openfst-1.2.7 openfst 1.2.7
clone_and_make_ocropus_lib https://pyopenfst.googlecode.com/hg/ pyopenfst
clone_and_make_ocropus_lib https://ocroswig.ocropus.googlecode.com/hg/ ocroswig
clone_and_install_python_lib https://ocropy.ocropus.googlecode.com/hg/ ocropy

# compile iulib
cd iulib
sudo sh uninstall
sudo sh ubuntu-packages
scons -j 4 sdl=1
sudo scons -j 4 sdl=1 install
cd ..
date;

# compile ocropus
cd ocropus
sudo sh uninstall
sudo sh ubuntu-packages
scons -j 4 omp=1
sudo scons -j 4 omp=1 install
cd ..
date;

# compile openfst
tar -zxvf openfst-1.2.7.tar.gz
cd openfst-1.1
./configure
make -j 4
sudo make install
cd ..
date;

# compile ocroswig
cd ocroswig
make
cd ..
date;

# compile ocropy
cd ocropy
sudo python setup.py install
cd ..
date;

# compile Python bindings for openfst
cd pyopenfst
make
cd ..
date;

Detail(1) Libgphoto2 and gphoto2 file dependencies-flow chart

Detail(2) Decapod stereo capture

Detail(3)
Detail(4)

Remarks:

Hints:

1)If you have a G10 which has an older version firmware and you want to update it. Please go to this website and input the serial number of your G10,do it carefully by reading the instruction manual (PDF) to avoid damage in your camera

http://www.canon.co.jp/imaging/dcp/firm-e/psg10/download.html?Submit=Go+to+the+download+page

2) Remove the SD Card of your G10 camera it is necessary to avoid the mounting of G10 memory card drive (it will cause conflict in USB ID and ports).

3)If you can not use a mercurial downloader "hg clone" and its connection is being aborted to that google.code server -one thing is certain. You dont have the certificate to access its "https://" host server.Better install openssl first in your computer so that you can work smoothly to a mercurial copy or downloading.
root@localhost# sudo apt-get openssl
Warning!
if you would change your proxy then (1) reinstall your openssl , (2) delete the ssl certificate; otherwise you can't get the host server (for security reasons).
Conclusions:

Zeroshell Innovation and Deployment

2011-02-28T18:28:00.000-08:00

Keywords: Ldap,Kerberos,proxy, captive portal,radius

Introductions:

Hello once again, as you would notice we had done a lot of service applications.I think its time for us to focus (or deviate our views ) on security and networking.Why? well simply because ,we just don't want it to be robust enough for a rigid applications but to secure our system with a centralized access-as our goal.This time we will be discussing a sort of making the safest system to make intruders or hacker wonders away from the scenes of our network confidentiality .Yet,with out the efforts of digging out deep knowledge on how to anticipate those intruders ,malicious access that will ruin our system in peril.Of course not only that , we need to monitor activities(logging) also on 24/7 basis ;for us to analyze rather determine if it is working smoothly or nobody will crash our system -as our assurance.

One thing which may follow is the outsourcing(research ) of appropriate software (which if free..) that will cater all our necessity and requirements.If you could still recall, we had previously tried different free application services on the net: pfsense,ipcop, drupal with chillihotspot and lastly the WifiAdmin.Well they been tested also as good as what they did promised, yet we needed these all to be in one package and Zeroshell have it all.

Zeroshell is a small Linux distribution for servers and embedded systems which aims to provide network services. As its name implies, its administration relies on a web based graphical interface. There is no need to use a shell to administer and configure it. Zeroshell is available as Live CD and CompactFlash images, and VMware virtual machines.Zeroshell is not based on an already existing distribution as for example Knoppix is based on Debian. The author has compiled the whole software of which the distribution is composed starting from the source code in the tar.gz or tar.bz2 packets. The compiler gcc and the glibcs of the GNU have been compiled too and have had the so-called phase of bootstrap in which they have recompiled themselves more times. This has been necessary to optimize the compiler and to eliminate every dependence from the glibcs of the system from which the first compilation took place. Some of the initialization scripts, as well as the guidelines followed by the author are those of Linux From Scratch. For a list of the used software look here.

Some of the innovations that we will aim for this free software are porting its applications to an embedded PC, a rack mounting deployment in our Data Center, then a quality testing on gateway and router applications and lastly to test rigidly all its features.

Best features of Zeroshell:
Captive portal
Radius
Firewall
Router/Bridge/Gateway
MRTG
LDAP
X509 certificates
QOS
Load Balancing
NAT

Requirements:

Phase I
PC (p4 or higher) Zeroshell server
PC (windows) software loader/imager
Image burner software
Zerohshell (linux)
Hard disk (SATA/IDE /USB or CF card)

Phase II
Embedded PC(Soekris Net501)

Methodology:

Download softwares(Windows and Linux)
Linux:
Download install
root@localhost# wget
root@localhost#

Windows:

Setup hardware
Connect the Zeroshell HDD as slave
Open phDiskwriter
Drag the image and save

Detail(1): Download accessories file required for Zeroshell installatios.

Detail(2)Physdiskwrite-GUI as another options (Oww-Russian?)

Detail(1) Please check your working drive to avoid form accident damage
(else forget yourself)

Detail(2) physdiskwrite.exe -u ZeroShell-1.0.beta14-CompactFlash-IDE-USB-SATA-1GB.img

Detail(3) Choosing the 2nd drive is by marking your working HDD

Detail(4) after bytes image "Finish"

Detail(4) A glance of a working prototype -Zeroshell Gateway

Detail(5) Web administration login

Detail(5) Zeroshell menu setup

Detail(6): Zeroshell configuration menu

Detail(7) Assigning WAN/LAN IP address

Detail(7):The issuance of credential /certificate x509 -SSL

Detail(8): Network IP Addressing notes

Detail() Multi Router Traffic Grapher

Detail() Captive portal login:

Remarks:

Hints:
Please take note on setting up a wireless connection using Zeroshell:
Here are our cases:
Case I:
1)We don't have a preferred Altheros wireless card ,instead we will use the available WiFI-Access point.
2) We want zeroshell to captive our wireless clients before an Internet access .

(-)In doing so, our zeroshell will acts like a router/gateway .

1)Zeroshell : 192.168.0.1(internal IP address) ,as a router.
2)Disable the DHCP server of the Wifi Access point (WRTG54g) , make its IP address within the Zeroshell subnets.WRTG54g IP address must be in the subnet range which is assigned by Zeroshell that acts as DHCP server now.
Ex:
192.168.0.1/24 (Zeroshell)
IP address range
192.168.0.2 to 192.168.0.255

3)WRTG54g: 192.168.0.2 now acts as a client

4) Connect Zeroshell [192.168.0.1] ether port to WRTG54g LAN port not to its WAN port! (usually with 4 LAN ports)

5) Wifi-clients (PC or laptops) should be able to access the Internet at this time.
5.1) Refresh wifi network icon
5.2) Connect to the WRTG54g ssid
5.3) You must see a captive portal's login (as mentioned above)
5.4) Then bingo, you are now redirected to the www(:=))

Case II:
1) We want to directly connect clients to our networks permitted first by Zeroshell
2) Main router/gateway will broadcast IP address to our clients.

(-) In doing so we need to configure Zeroshell in a Bridge Mode setup.

Case III:
1) We want Zeroshell to do the authentication process using external LDAP
http://www.zeroshell.net/eng/qos/#Add-QoS-Class
(-) To do so, we need to configure FreeRadius server hard coded in our Zeroshell to use the LDAP backend instead, this is trough configuring FreeRadius script -radius.conf.
http://www.ibm.com/developerworks/library/l-radius/

III.1) Zeroshell uses freeradius which supports proxy and ldap integration.Find radiusd.conf and edit with vi or emacs ; uncomment the LDAP statement as necessary.

ldap {
server = FQDN for your server or IP address
login = ldap login looks like cn=?,o=?,c=?
password = ldap password
basedn = ou=?,dc=?,dc=?

III.2)To make it work. look for any other sections for ldap then uncomment it.Edit your dictionary.conf, make sure a Value of LDAP IS PRESENT if not add it in or uncomment it.

III.4)Look for users.conf and add the default entry for :
Auth-Type =: LDAP
Fall-Through = 1

Note:
For your LDAP server to authenticate then it should be ready to serve requests. So reestart freeradius service and Zeroshell should be checking with the ldap server for credentials.

Conclusions:
So far I considered zeroshell as a promising Linux software applications which is a complete embedded web security portal.

Knowledge Tree (Open source File Management System)

2011-02-09T22:12:00.000-08:00

Introductions:

Offices management almost requires an automated systems for an easy and fast transactions , a lot of files :contain different contents;name all of those and probably we will mention as many as we can(oh bulky files: receipt,appointment, voucher,cheque,release , issuance ,salaries and many to mentions-as I said).Hey, this great importance of file managements system sometimes or if not most of the times are not being adopted in the traditional work-flow of a local/common offices so why ?Well, despite the fact of such reasons behind necessity , still offices cant afford to implement the said system.Simply because , it involves huge amount of budget,or of course a financial buffer .Either purchasing it or paying for an IT programmers to have a defined or customized built in systems that will certainly suit s the requirements of office working flow -still needs huge capital.

But that not ends our aim to acquire such system, why? just an open-source will give(save) us a simple remedy ;and it is free for anybody who wanted to use it.

So ambitious as we are(no just trying),this techno blog will teach you a simple procedures the How-to of deploying free File Management system-yes brother its free.Just follow the steps and download each software packages (before I forgot your old PC can perform as an alternative sever for your DBase).Before proceeding , this tutorial will be using a Knowledge Tree Community Edition file management software.

KnowledgeTree is a provider of online document management software. The product makes use of the cloud computing platform from Amazon EC2. KnowledgeTree’s features — including workflow, document alerts and version control — are designed to help organizations manage business processes around documents in addition to enabling file sharing among teams. The service is available on a subscription basis.

There is also a free, open source community edition that is written in PHP and uses the Apache Web Server and MySQL database management system. A multi-platform installer provides end-users with a one-click install of both the underlying LAMP or WAMP stack and the application itself.

KnowledgeTree is a US company with headquarters in Raleigh, North Carolina. The company also has an office in Cape Town, South Africa.

Then let us try it for free!

Requirements:
Open Source OS
FreeBSD ,Ubunto, Fedora 1X ,CentOS ,OpenSuse
Open Source Software:

Knowledge Tree Community Editions (3.7)
PHP 5.2.x
PHP LDAP extension (if LDAP or ActiveDirectory integration is required)
PHP Exif extension (if header extraction from JPEG and TIFF files is required)
PHP mbstring extension (functions for multi-byte character sets)
PHP mysql extension (interface to mysql database from php)
PHP json extension (functions for working with json structures)
PHP fileinfo extension (functions for resolving mime types of documents)
MySQL Server, Client, and PHP libraries, version 5.1 or above
Apache 2.0 or above
Java Runtime Environment 1.5+ (Required for Apache POI and Lucene)
pstotext (required for indexing of postscript files)
OpenOffice 2.4+ (required for PDF conversion)
Info-Zip (required for extracting contents of zip files)

Methodology:

Download the packages
PHP(version 5)
root@localhost# sudo apt-get install gcc*
root@localhost# sudo apt-get install php-devel
root@localhost# sudo apt-get install php-mysql
root@localhost#

sudo apt-get install php-pecl-json

root@localhost#

sudo apt-get  install php-pear

root@localhost# sudo apt-get install pecl/json

To enable exif-support configure PHP
with --enable-exif

To enable LDAP support configure in PHP
--with-ldap[=DIR]
root@localhost# sudo apt-get install libmime-devel
root@localhost# sudo apt-get install libmagic-dev
root@localhost# sudo apt-get install file-devel
root@localhost# sudo /usr/local/php5/bin/pecl install fileinfo
root@localhost# sudo pecl install Fileinfo

To enable MBstring in PHP
-enable -mbstring --enable-mbregex


root@localhost# sudo apt-get install libmbfl*
 root@localhost# sudo apt-get install php-mbstring
 root@localhost# sudo apt-get install pstotext*
 root@localhost# sudo apt-get install Openoffice*
 root@localhost# sudo apt-get install info-zip*

MYSQL
APACHE
JAVA JRe (1.5)
root@localhost# sudo apt-get install jre*

Remarks:
Hints:
I was a little bit stuck not because I miss info's in the process but that I accidentally deleted that "dpkg" in Ubunto(my distro for a moment).So,I could not used to install(terrible!) ,yet I stumbled and solved it -atlast!
The error??
Sub-process /usr/bin/dpkg returned an error code (100)

The solutions:
Create a Director where to store the new dpkg package
root@localhost# mkdir /tmp/dpkg
root@localhost# cd /tmp/dpkg

Now download the package
root@localhost# wget http://archive.ubuntu.com/ubuntu/pool/main/d/dpk g/dpkg_1.15.5.6ubuntu4_i386.deb
root@localhost# wget http://archive.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg_1.15.5.6ubuntu4_amd64.deb

Extract the compressed files
root@localhost# ar x dpkg*.deb data.tar.gz
root@localhost# tar xfvz data.tar.gz ./usr/bin/dpkg

Copy the the bin files to "/usr/bin"
root@localhost# sudo cp ./usr/bin/dpkg /usr/bin/

Update the Ubunto dpkg pakckage
root@localhost# sudo apt-get update
root@localhost# sudo apt-get install --reinstall dpkg

Conclusions:

Repository Harvester(PKP & Google)

2011-02-06T20:53:00.000-08:00

Introductions:

Repository system is a bit challenge to the trend of online digital informations which are necessary to be integrated, and these are metadata,indexes or field link s to a searchable storage of archives.Just imagine a wide virtual system of one university library that could be a beneficiary to the other user/patron needs(researcher,teacher,students and other institutions) to get ample resources- electronic information. Given the available /free technology (Open source ) on the net and the knowledge of informations it is nowadays ' opportunity to unified every database of knowledge available elsewhere (World Wide Web).
If this is everybody's goal and we set this vision come into real , one thing we can invoke of having a unified opportunity of grabbing every archive or repository is by way of harvesting it. Yes brother we need to harvest those knowledge online and we need a harvester which is a free system-Open Harvester System
Open Harvester Systems is a free metadata indexing system developed by the Public Knowledge Project through its federally funded efforts to expand and improve access to research.

OHS allows you to create a searchable index of the metadata from Open Archives Initiative (OAI)-compliant archives, such as sites using Open Journal Systems (OJS) or Open Conference Systems (OCS).

Requirements:
Hardware:
Quad-Core CPU Cerver (i7,xeon AMD or etc)
Software:
OS:(Linux,FreeBSD,CentOS,Fedora
Apache2,Mysql,PHP,
OHS Software

Methodology:
sudo apt-get install apache2

sudo apt-get install php5

sudo apt-get install libapache2-mod-php5

sudo /etc/init.d/apache2 restart
sudo apt-get install mysql-server
sudo apt-get install php5-mysql

Methodology:
Installing Apache2
./configure --prefix=/usr/local/apache2 \
--enable-so \
--enable-cgi \
--enable-info \
--enable-rewrite \
--enable-speling \
--enable-usertrack \
--enable-deflate \
--enable-ssl \
--enable-mime-magic

Installing PHP
./configure \
--with-apxs2=/usr/local/apache2/bin/apxs \
--with-mysql=/usr/include/mysql \
--prefix=/usr/local/apache2/php \
--with-config-file-path=/usr/local/apache2/php \
--enable-force-cgi-redirect \
--disable-cgi \
--with-zlib \
--with-gettext \
--with-gdbm
Remarks:
Hints:
1)How to reinstall apache2 completely:
root@localhost# /etc/apache2# 
/etc/init.d/apache2   start .: 45: Can't open /etc/apache2/envvars
Try to execute the CLI
root@loccalhost# sudo apt-get remove --purge apache2 apache2-utils

Then reinstall the apache2
root@localhost# sudo apt-get install apache2
If Error(98) socket bind problem or already in use 0.0.0.0:80
Try typing this command to find out which uses port 80
root@localhost # netstat -A inet -lnp
root@localhost # kill xxx (ID for port 80)
2) In installing PHP
I've encountered some miss files :
libmysql-dev
libqdbm
Note if it is a built installations(PHP won't see mysql header files(*.h))
so try to add this in your configurations 
--with-mysql=/usr/include/mysql
3) Reinstalling a Mysql
Error:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysq
Try this mysql safe comand to help solve that problem:
root@localhost# mysqld_safe
Try another CLI Tab
root@localhost# mysql -u root -p
..there you have it solved

Building a Web Search Engine

2011-02-01T17:23:00.000-08:00

Introductions:

I often think of google ,yahoo and other web search engines, actually I don't have any idea of those ,what I mean a deeper thought of developing it before.Until , little by little it would be a coincident now in my own scope of work.Yes, I am getting the idea that if I could run Zebra server together with its client (Yaz to be particular) I would be having a simple web search engine-think it ain't obvious. Ohhhm ...pretty cool ;of course that requires authentications and permission to the end(peer) server, and that is how these big web search engines are doing ( am correct?) .

In this case , we can refer this topic " Installing Zebra(z3950 protocol)" that I have blogged recently.

Apparently ,I have search out (wheew!) that we need other party to browse it via http (that is the new features of YAX 4.1.XX getting data via HTTP protocol-we'll see it brother!)and this is the job of SOLR application software.SOLR is the popular, blazing fast open source enterprise search platform from the Apache Lucene project. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, and rich document (e.g., Word, PDF) handling. SOLR is highly scalable, providing distributed search and index replication, and it powers the search and navigation features of many of the world's largest internet sites.

SOLR is written in Java and runs as a standalone full-text search server within a servlet container such as Tomcat. SOLR uses the Lucene Java search library at its core for full-text indexing and search, and has REST-like HTTP/XML and JSON APIs that make it easy to use from virtually any programming language. SOLR's powerful external configuration allows it to be tailored to almost any type of application without Java coding, and it has an extensive plugin architecture when more advanced customization is required.

Now let's have a try if this could make a straight forward approach on how to develop a simple search engine, again what we need is a server to host the records such as the meta-data/indexes and the client to communicate the server in a z3950 protocol way.

That is it for now.

Requirements:
For our requirements
Installed Zebra server
http://ftp.indexdata.dk/pub/zebra/idzebra-2.0.45.tar.gz
Configured Zebra server
Testing Marc to Zebra server
Installed YAZ client
http://ftp.indexdata.dk/pub/yaz/yaz-4.1.3.tar.gz
Configured YAz client
Search index Zebra server's marc records
Installed SOLR (new)
http://ftp.wayne.edu/apache//lucene/solr/1.4.1/apache-solr-1.4.1.tgz
Configured SOLR
Installed Java
http://apache.cyberuse.com//lucene/java/lucene-2.9.4-src.tar.gz
InstalledTomcat (new)
http://apache.cs.utah.edu/tomcat/tomcat-7/v7.0.6/bin/apache-tomcat-7.0.6.tar.gz

Methodology:

Detail(1) Testing Zebra server for HTTP

Remarks:

Conclusions:

Zebra Server -Index searcher (Z3950 protocol)

2011-01-04T01:01:00.001-08:00

Introductions:

A little story for this techno-server development,after eprints was set-up into a commercial grade repository the applications,customization and etc. We need some application services to to build along with eprints to port its records from another back up or a new storage server , and we must have marc21 protocol running into it. After marc21 was successfully installed/rebuild with eprints (thanks to the third party software-still an open source ), a need to harvest metadata is a must -that is polling the records /indexes to a remote new depository server - a harvester services; thus replicating a metadata from a remote eprints server . A triggering applications for a service engine to pulled indexes records and the solution to make it happen completely is non other than Zebra...

Zebra is a high-performance, general-purpose structured text indexing and retrieval engine. It reads structured records in a variety of input formats (eg. email, XML, MARC) and allows access to them through exact boolean search expressions and relevance-ranked free-text queries.

Zebra supports large databases (more than ten gigabytes of data, tens of millions of records). It supports incremental, safe database updates on live systems. You can access data stored in Zebra using a variety of Index Data tools (eg. YAZ and PHP/YAZ) as well as commercial and freeware Z39.50 clients and tool kits.

Zebra is free software, available under the GPL license. It may be used by anyone without charge. If you wish to incorporate Zebra into a commercial software distribution, please contact us about alternative licenses.

Notice: Optional, commercial support is available for Zebra.

Requirements:
Depository
Eprints (example with MARC(XML/ISO) protocol)
Koha

Methodology:
Download this prerequisite files:(incase you need a source build-rpm)
root@localhost# yum install gnutls-devel
root@localhost# yum install libicu-devel

For Centos Operating system
Download yaz src rpm(to date installation)
root@localhost# wget http://download.fedora.redhat.com/pub/epel/5/SRPMS/yaz-2.1.54-1.el5.1.src.rpm
root@localhost# rpmbuild --rebuild yaz*src.rpm
root@localhost# cd /usr/src/redhat/RPMS/i386/(in my case-Centos!)

root@localhost# rpm -ivh libyaz-2*
root@localhost# rpm -ivh yaz-2*
root@localhost# rpm -ivh libyaz-dev*

For Fedora Operating sytem
root@localhost# yum install libyaz libyaz-devel
root@localhost# perl -MCPAN -e 'install "MARC::Record"
root@localhost# perl -MCPAN -e 'install "MARC::Charset"
root@localhost# perl -MCPAN -e 'install "MARC::File::XML"
root@localhost# perl -MCPAN -e 'install "XML::Simple"
root@localhost# pelr-MCPAN -e 'install "Znet::Z3950::ZOOM"

Tar installations
Note:**
Since I was using an old Centos5 the best idZebra version which suits to version 2.44(idzebra-2.44.tar.gz).You can download it in the Zebra file/source archive.
Download idzebra-xxx.tar.gz file
Unzip and untar
tar zxvf idzebra-xxx.tar.gz
cd idzebra-xxx
./configure –help
./configure
Make
Make install

Or an options if you preferred directory
If you are not the system administrator, you can run zebra server from you home directory.
Run the following commands
root@localhost# tar zxvf idzebra-xxx.tar.gz
root@localhost# cd idzebra-xxx
root@localhost# ./configure –prefix=$HOME
root@localhost# make
root@localhost# make install

Directory Structure will be in..
$HOME/bin
Will have zebraidx and zebrasrv
$HOME/include
Include files
$HOME/share
Manual pages

Testing with MARC21
1) Goto the directory
root@localhost# cd idzebra-xxx/test/usmarc
You should see…
zebra.cfg (configuration file)
records (directory )
Note:
Records directory will be having a file called ‘sample-marc’
it contains MARC21 records in ISO-2709 format

Generating the Index
Run the following command
root@localhost# zebraidx update records
Note:*
Index files are created with the extension ‘.mf’ This is essential for search;Now you can start the z39.50 server

Starting Z39.50 Server
Run the following command
root@localhost# zebrasrv
You will see the following message
09:35:09-09/12 [log] zebra_start zebra.cfg 1.3.32
09:35:09-09/12 [server] Adding dynamic listener on tcp:@:9999 id=0
09:35:09-09/12 [server] Starting server zebrasrv pid=8856
1st Line: version number of the zebra server
2nd Line: zebra server is running on port 9999
3rd Line: Process id of program is 8856

And browse at
http://localhost:9999

Testing with MARCXML
root@localhost# cd test/marcxml
You will see marcxml files
m1.xml, m2.xml, m3.xml
Create a directory called ‘records’ and copy xml files into it
root@localhost cd records
cp *.xml records
Note:
In this case, each record is placed in a separate file, unlike the iso-2709 files where all the records are placed in one file

Testing (searching live!) from server to client
1) Activate the server
root@localhost# zebrasrv
If you want to update new marc records (well, we choose marc protocol)
root@localhost# zebraidx update records ( records here are the directory that
contains new upload *.marc files)

2) Windows client
Install Mercury 39.50(easy and fast for windows installations)

Configuring Mercury client

Edit for target Zebra Server

Options /setting for Mercury Database

Search entries (Title/Authors)

Displaying /parsing Marc records

Here is the log file in the Zebra server
20:44:27-12/02 zebrasrv [log] dict_lookup_grep:(\x01\x0A)(kuwerdas)
20:44:27-12/02 zebrasrv [request] search defualt OK 3 1 1+3 RPN @attset Bib-1 @attr 1=4 Kwerdas

3) Linux Client
Just type yaz client service
root@localhost# yaz-client
Z>
Then...
Z> auth "username" "password"
Z> open ip_address:9999
Z> scan

Note:*
You will see that Zebra server is responding every time the client request a command session - so observe it!

Remarks:
Sine I was installing two flavour (Centos & Fedora) I would chat down issues with regards to their installation problems:example (Net::Z3950::ZOOM)

Fedora
1) Installing YAZ is easy
root@localhost# yum install libyaz libyaz-devel
2) If you encounter problem " could not find /usr/sbin/ld -lwrap" problem (its library wrapper)
root@localhost# yum install " *wrap* " (there you can install all the file..)

3)Another is the decryption /encryption for YAZ -if this problem occurs , here is the solution for that.
root@localhost# yum install "*crypt*"
...and that would be fine any more and forever more !

Centos
1) Installing YAZ is difficult
Well to resolve: download the YAZ file from its source, be sure that your rebuild it completely and then install, and if not and try this to be safe.
root@localhost#yum install openssl openssl-devel readline readline-devel libtool
root@localhost# yum install rpm-build
then after it's solved -then that could be fine for YAZ installations.
root@localhost# rpmbuild --rebuild yaz-2.1.54-1.el5.1.src.rpm

If encountered Zebra mapping error(*.o or *.c or *.h)!
It usually happen when your YAZ files is outdated compared to a new source of zebra that you have. So, you must run concurrent dependencies to its equivalent machine core.

Index Data don't have the resources to build YAZ and Zebra for all RPM systems out there. However developer provide spec files that usually work.. Here's the procedure for building YAZ and Zebra for your platform (Fedora Core 1X on i386).

1)Uninstall ALL existing YAZ components that you got from
kojipkg. etc..
root@localhost # rpm -ve libyaz3
And other commands if you have other components (say yaz).

Now the procedure is as follows:

root@localhost# wget http://ftp.indexdata.dk/pub/yaz/yaz-3.0.47.tar.gz
root@localhost# rpmbuild -ta yaz-3.0.47.tar.gz
Note:
Please goto "rpm-build installation" if you can't build the yaz-source.Then,

root@localhost# ls /usr/src/redhat/RPMS/i386
root@localhost# sudo rpm - vi /usr/src/redhat/RPMS/i386/*yaz*.rpm

You have now installed all YAZ components including libyaz3-devel which
is required for building Zebra. Now download the latest zebra with this:
(just assuming the file version)

root@localhost# wget http://ftp.indexdata.dk/pub/zebra/idzebra-2.0.40.tar.gz
root@localhost# rpmbuild -ta idzebra-2.0.40.tar.gz
root@localhost# rpm -vi /usr/src/redhat/RPMS/i386/*zebra*.rpm

If the installation don't work-- then please re inspect the proceeding /instructions above(YAZ & Zebra installations)-maybe you have missed one!

Conclusions:

Fedora Core 1X Mirror Server

2010-12-04T00:16:00.000-08:00

Introductions:

Its been quite a while when Fedora Team had release a new OS/platform-version 14.Yet, some of the configuration for "yum" installations issues can not be resolved and the caused is the incorrect path of its mirrors and base url-(servers).And if it's left unconfigured then it seemed that you have not installed OS-useless!

So upon stumbled on this site,I now resolve this problem ever-hopefully.

http://digitizor.com/2009/06/17/how-to-fix-the-cannot-retrieve-repository-metadata-repomd-xml-error-in-fedora-11/

The recently released Fedora 14 Leonidas has some issues with it’s regular update process. Many users are getting a strange error which complains about the inability of the update system to retrieve the repository metadata, namely repomd.xml. You can see the error as attached in this inlet below:

Objective:

1)To resolve this errors

Error: Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again

Requirements

When we tried to install Fedora 14 for the first time, we also faced a similar problem. A quick twitter search brought us to a conclusion that we were not alone. But a little tweaking of a few system files brought us back on track. In this article we tell you, how to go about resolving the problem in case you face it too.

Methodology:

You need to edit two of your repository files: /etc/yum.repos.d/fedora.repo and /etc/yum.repos.d/fedora-updates.repo. Now un-comment all the lines that start with the term baseurl and place a comment before all lines that start with mirrorlist. This should be done for both the above files.

Now edit your /etc/hosts file and append the following to it’s contents:

80.239.156.215          mirrors.fedoraproject.org
213.129.242.84          mirrors.rpmfusion.org

The other solution if "respomd.xml errror" still occur , try to browse the fedora mirror site then you will be redirected to your nearest countries mirror site and used it as your new " baseurl" in /etc/yum.repos.d/fedora.repo and /etc/yum.repos.d/fedora-updates.repo.

baseurl=http://ftp.yz.yamagata-u.ac.jp/pub/linux/fedora/linux/releases/$releasever/Everything/$basearch/os/

Remarks:

0) Please note that specified port(port :number 80/8080) must be open to at your http_proxy or ftp_proxy , else error pycurl 6/error # 14 will occur again and again.

root@localhost# export http_proxy=http://10.36.129.X:8080

1)Now try updating your system or installing any software via Yum. You will see, the error is now resolved and the error message is not shown anymore.

2) and please try this command if there is a failure and trying to find other mirror/s.

Package does not match intended download. Suggestion: run yum --enablerepo=updates clean metadata
root@localhost# yum --enablerepo=fedora clean metadata

3) The same procedure is also working with Fedora15

Conclusion:

This problem has now been resolved by the Fedora Community. But you may still not be able to download the updates properly from the mirrors due to the busy network and rush.

WiFIAdmin (Wireless Gateway)

2010-11-04T17:48:00.000-07:00

Introductions:

Wireless connections? we got it! WifiAdmin is an open-source software for wireless access monitoring and administrations.It was developed by a group of students from the patrasch university in Greece.This software has gained a wide attentions to the community who are fanatic to the development of radius and captive portal.

WifiAdmin has the following installation script
0.language selection
1.configuration file creation
2.Database Creation
3.Routers Registration

Basically the software was coded in "php" and used some of its graphics libraries.
Now, you may have the chance to evaluate this software -

Objectives:
To set-up a wireless access control server
To authenticate wireless users
To monitor wireless users' identities

Requirements:
Hardware:
Any CPUs : Intel,MAC ,AMD

Software:
Apache
php
WifiAdmin

Methodology:
1)Choose to download WifiAdmin in this site:
http://linux.softpedia.com/get/System/Networking/WiFiAdmin-5053.shtml
2) Follow this configurations & installations- WEB SERVER with PHP ( I used Ubunto here)

for apache
bopher# sudo apt-get install apache2
bopher# sudo /etc/init.d/apache2 restart

for php version 5
bopher# sudo apt-get install php5
bopher# sudo apt-get install libapache2-mod-php5 (optional)

for mysql
bopher# sudo apt-get install mysql-server
bopher# sudo apt-get install php5-mysql

create database in mysql
bopher# mysqladmin -u user -p dbname
bopher# mysql -u user -p dbname < style="color: rgb(153, 102, 51);">
for WifiAdmin
bopher# tar -zxvf WifiAdmin-version.tar.gz (the latest release)
bopher# cd /WifiAdmin-version
bopher# mv /WifiAdmin-version /var/www/wifi (apache web directory)

open your browser to http://localhost/wifi/ and see the detail's photos

3) Follow the specified network diagram
4) Have a simple server to client wireless connections testing
5) Monitor and control the user's access

Detail(1):

Detail(2):

Detail(3):

Detail(4):

Remarks:
Simple and direct web installation,try it for yourself bro!

Conclusions:
No cost , robust , and easy to configure wifi admin server.

OSX Accounts(Add user/s & group)

2010-10-13T19:15:00.000-07:00

Introductions:
Recently , my task is to migrate eprints in MAC Xserve and it was running in OSX platform.I thought there would be no painstaking hardwork that I woud be experiencing-I was wrong.Though OSX is inheritance of UNIX , there were additional functions for MAC which UNIX had not or nevertheless unsupported.Some were : the CLI command , installer , and additional file folder exclusively for MAC ony.Yet, everything seemed ported well, except a more funnier thing was the adding of user and group account for eprints.And you know why? It wasn't just as easy as "useradd" or "groupadd" but a more little deeper config just to have a new user /group accont in OSX- I am telling you.
Adding a user is something easily accomplished using the built in GUI tools that ship with OS X, however any power user can appreciate the possible efficiency gained from using the command line. So in the spirit of efficiency here are the steps necessary to add a user to your Mac OS X system all with our good friend, Terminal.app.These commands need to be run as either the root user or with the “sudo” command. For more information on the sudo command see the sudo man page.

Objectives:
1) To have a procedure in adding accounts in OSX-MAX CLI
2) To have a procedure in adding accounts in OSX-GUI menu.

Requirements:
Any computer with running OSX operating sytem ofcourse -Apple bro...
And please visit this site http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/dscl.1.html

Methodology:
Copy and Modiy the MAC main tutorial

CLI Mode (shell command)
Create a new entry in the local (/) domain under the category /users.
dscl / -create /Users/eprints

Create and set the shell property to bash.
dscl / -create /Users/eprints UserShell /bin/bash

Create and set the user’s full name.
dscl / -create /Users/eprints RealName "UP Digital Repository"

Create and set the user’s ID.
dscl / -create /Users/eprints UniqueID 503

Create and set the user’s group ID property.
dscl / -create /Users/eprints PrimaryGroupID 1000

Create and set the user home directory.
dscl / -create /Users/eprints NFSHomeDirectory /Local/Users/eprints

Set the password.
dscl / -passwd /Users/eprints eprints1234
or
passwd eprints

If you would like UP Digital Repository to be able to perform administrative functions:
dscl / -append /Groups/admin GroupMembership eprints

Another CLI Mode

Create the group

Find out the next gid. If there’s not one higher than 501 use 501, otherwise add one to the greatest number in this list: nidump group . This will also do it and just return the highest currently used number nidump group . cut -d: -f3 sort -n tail -n 1

sudo nicl . -create /groups/mygroup

sudo nicl . -create /groups/mygroup grouppassword \*

sudo nicl . -create /groups/mygroup gid 508
Append users

sudo nicl . -append /groups/mygroup users rod

sudo nicl . -append /groups/mygroup users jane

sudo nicl . -append /groups/mygroup users freddy

repeat to fade
Change owner of a folder and all sub folders, files

sudo chown -vR :mygroup ~/myfolder

sudo chmod -R 775 ~/myfolder

Logout and back in again to get your credentials with the new group in it up-to-date.
Job done.

In GUI Mode (gui command)
You can create individual user accounts for each person who uses your computer. Each new user has a separate home folder and can adjust his or her own preferences without affecting other users.

Choose Apple menu > System Preferences and click Accounts.

If some settings are dimmed, click the lock icon and type an administrator name and password.
Click Add (+) and type the user's name.

If you don't want to use the short name generated automatically, type a new short name. (Once the account is created, you won't be able to change the short name.)

Type the user's password in the Password and Verify boxes.

Type a hint to help the user remember the password if they have trouble remembering it at login.

Click Parental Controls and select options to determine what the user can do with the computer.

If you change your mind while you're creating a new user account, click Delete (-) to cancel.

Summary:
It is quite cool simple thing but if left unresolved will be an enchant disaster.

Conclusion:
It is done

Decapod for RoBook Scanner

2010-08-03T09:07:00.000-07:00

Introductions:

So far I am having a hardly thoughts on how I could clearly grasped designing stereo camera to capture imagery ;perhaps, via software or driver .Although the allotted span of time would take only just for (one) 1 semester. Apparently ,I have had this topic on the other part of my web blog that deal solely to "RoBook Scanner" and I knew that the topic would be too lengthy if I would not include or separated Decapod discussions here.

Decapod is an Opensource project ,it is a software tools used in a book scanning and was sponsored by Andrew W. Mellon Foundation ; the project is being maintained by volunteers and dedicated people around the globe-kudos to them! Imagine how much is the cost of a commercial book scanning software? oh huge price. Anyway ,never mind because Decapod is free to everybody who aspire the best of its suited applications . Recently,I have included this project in my techno-blog because I considered it as one of the best freeware you can ever have for free .It is a combination of a different software programs which were intended and incorporated for book digitization.; and to mention those share & freewares: gPhoto, OCROpus, Image editing/cropping , kPDF and the server hosting too.

So am beleiving this was really a real open source community project -indeed.

I want to share here the steps in installing Decapod in Fedora version #13(the most recent release?) and Ubunto version 10.04 .I will try to test steps and find out if it would really give me a lucky try.

The last things to say is to get it done(OK here we go!)

Requirements:
Hardware:
2 Cameras (Canon G10 or the latest series)
Tripod or camera handler
Lamp variable lights ( to pre-scale ,shutter or luminance)

Software:
Ubunto 10.04
FireFox web browser latest release
Decapod
-gPhoto
-Imagemagic
-OcrOpus
-genPdf
-Cherrypy

Objectives:
To Install Decapod and its modules
To setup decapod server
To stereo capture image using two cameras

Methodology:
Install tools and libraries
Download Decapod release version (0.4)
Run install script
Test decapod server
Test stereo camera capture

How-Tos:

Download
1)hg clone https://decapod.googlecode.com/hg/ decapod-0.4
or
2) wget http://www.google.com/url?sa=D&q=http://code.google.com/p/decapod/downloads/detail%3Fname%3Ddecapod-0.4.zi&usg=AFQjCNF0WtK35E69fflnd4CiPuDRbhiyEw

Install the script

cd decapod-0.4/install-scripts/
sudo ./decapod-all

Run the server with cameras

cd decapod-server/
python ./decapod.py

Run the server with no cameras

cd decapod-server/
python ./decapod.py --no-cameras

Here are the details for Book Scanning using Decapod-0.4

Detail(1) Running the Decapod Server successfully

2) Decapod server CLI activity status

Detail(3) The front end GUI of the Decapod server

Detail(4) Testing the Camera (stereo capture)

Detail(5)Calibrations before capturing

Detail(6) Image calibrations L-R pages

Detail(7)python decapod.py --no-cameras

Detail(8)Decapod exporting files process (PDF)

Detail(9)Decapod on exporting image to PDF

Detail(10) Decapod Generating pdf

Detail(11) A lot more to bind and scans (thanks for a Decapod community!)

Remarks:
First you need to install all the libraries and tools.You will have the options to have an automatic install script ;or download it and have a manual installations.
There is an active cli while running a Decapod server(opening it using Firefox -http://localhost:8080

Conclusions:
Cool as ice book scanning

Simple NAT Server

2010-07-09T22:15:00.000-07:00

Introductions:

Hello folks, nice jotting again; I don't know if I would include this article until I needed it applications.How can I put external IP address with in my LAN so I must also have a local address.Simple NAT configurations will solve my problem with a little ease. It is because I am going to setup a live Asterisk VoIP Server one public and another one internal/private address.Public IP for WAN and Private address for my clients to get connected in the server.

A simple Network Address Translation will be doing the tweaking after I prepared a twon NIC (Ehternet) machine ofcourse running in CentOS -(common OS for Asterisk Telephony). I have encountered some issues with SIP to NAT but it can be done easy in SIP trunking configurations, and besides that IAX are much better in avoiding this NAT traversal configuration .

SO , I hope that there will be another applications yuo can use with NAT servering.

Objectives:

To use NAT in Asterisk WAN to LAN IP addressing
To be able to configure NAT traversal in some VoIP protocols (IAX,SIP,H323)
To learn NAT howto (NAT servering)

Methodology:

In doing this VoIP over NAT, we need to have Unix/Linux like OS that has a nat package in its kernel .We may also try to intall its software update if there is none in the OS software package-there are plenty files/program available for free download on the net.

Anyway,here is how to setup NAT with Linux and iptables; and I'll be mentioning a step-by-step tutorial to configure Network Address Translation (NAT) with Open Source Linux operating system and iptables. This will allow your system to act as gateway and to provide Internet access to multiple hosts in Local Area Network (LAN) using a single public IP address.

Requirements:

1. Hardware server with 2 (two) network interface cards (NICs).
2. Any Linux distribution (get more information at DistroWatch.com).
3. Linux kernel with networking and iptables support.
4. iptables package (you can find latest release at NetFilter's Download page).

Basic definitions

aa.aa.aa.aa is Wide Area Network (WAN) IP address (bb.bb.bb.bb is WAN netmask).
cc.cc.cc.cc is LAN IP address (e.g. 192.168.0.1 or 10.0.0.1), dd.dd.dd.dd is LAN netmask (e.g. 255.255.255.0).
ee.ee.ee.ee is default gateway for Internet connection.

eth0 is hardware name of the NIC connected to WAN base.
eth1 is name of LAN connected NIC.

Step-by-step set up

1. Apply two NICs to hardware server.
2. Verify that both NICs are recognized by Linux well and are fully workable:

# dmesg | grep eth0
# dmesg | grep eth1

the output may vary but in most cases it would be like following one:

#
eth1: RealTek RTL8139 at 0xe0830000, 00:30:4f:3b:af:45, IRQ 19
eth1: Identified 8139 chip type 'RTL-8100B/8139D'
eth0: link up, 100Mbps, full-duplex, lpa 0x41E1

Similar output should be for eth0 NIC.

To verify that NICs are recognized by Linux as networking devices use the following commands:

# ifconfig eth0
# ifconfig eth1

In case of success the output will be as follows:

# eth0 Link encap:Ethernet HWaddr 00:50:56:C0:00:08
inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:41 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

You can find full manual page for ifconfig command here.

3. Configure WAN interface (eth0) to get Internet connection:
ifconfig eth0 aa.aa.aa.aa netmask bb.bb.bb.bb

e.g.

# ifconfig eth0 123.45.67.89 netmask 255.255.255.248

WAN IP address and netmask should be provided by your ISP.

4. Set up WAN NIC settings to apply after server start up.
Configuration files containing NIC settings may have different syntax and location in various distributions. For such distributions as RedHat, Fedora, Centos and similar ones eth0 configuration file is at /etc/sysconfig/network-scripts/ifcfg-eth0. In Debian, Ubuntu NIC settings are located at single file /etc/network/interfaces.

To edit configuration files use any preferred text editor like vim, GNU nano or any other.

After editing /etc/sysconfig/network-scripts/ifcfg-eth0 should look as follows:

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=aa.aa.aa.aa # e.g. 123.45.67.89
NETMASK=bb.bb.bb.bb # e.g. 255.255.255.0
GATEWAY=ee.ee.ee.ee # e.g. 123.45.67.1
HWADDR=00:30:4f:3b:af:45 # MAC address (optional entry)

After making changes to /etc/network/interfaces section regarding eth0 NIC should looks like:

auto eth0
iface eth0 inet static
address aa.aa.aa.aa
netmask bb.bb.bb.bb
gateway ee.ee.ee.ee

Related links: detailed syntax description of /etc/sysconfig/network-scripts/ifcfg-ethN, manual page of /etc/network/interfaces.

5. Set up LAN NIC settings to apply after server start up. This step requires operations similar to previous step.

Edit /etc/sysconfig/network-scripts/ifcfg-eth1 and make sure that it looks like:

DEVICE=eth1
ONBOOT=yes
BOOTPROTO=static
IPADDR=cc.cc.cc.cc # e.g. 192.168.0.1
NETMASK=dd.dd.dd.dd # e.g. 255.255.255.0
HWADDR=00:50:8d:d1:24:db # MAC address of LAN NIC (optional entry)

If you are using Debian or related Linux distribution, edit /etc/network/interfaces (see previous step):

auto eth1
iface eth1 inet static
address cc.cc.cc.cc
netmask dd.dd.dd.dd

6. Set up Domain Name System servers IP addresses by editing /etc/resolv.conf:

#nameserver 203.145.184.13
#nameserver 203.145.184.12

7. Enable IP Forwarding:

# echo 1 > /proc/sys/net/ipv4/ip_forward

8. Set up NAT with iptables:

To delete existing rules from every iptables table, execute the following commands:

#iptables -F
#iptables -t nat -F
#iptables -t mangle -F

Related links: official iptables documentation.

Enable NAT by commands:

# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
# iptables -A FORWARD -i eth1 -j ACCEPT

8. Configure LAN clients to access Internet via described gateway:

Use clients' operating system tools to set up the following TCP/IP settings:

IP address: from the same network as cc.cc.cc.cc (you can use IP/Subnet calculator to get it)
Netmask: dd.dd.dd.dd
DNS: ff.ff.ff.ff
Gateway: cc.cc.cc.cc

Example:

#
IP address: 192.168.0.7
Netmask: 255.255.255.0
DNS: 209.160.67.13
Gateway: 192.168.0.1

Remarks:

Conclusions:

MRTG (Multi Router Traffic Grapher) Server

2010-07-09T22:11:00.001-07:00

Introductions:

Our discussion here is all about an Opensource network monitoring software, no other than MRTG (Multi Router Traffic Grapher) which is an application that allows us to observe the traffic of a network. It generates html pages with graphs which are refreshed according to our network’s current state. Its source is written in Perl and C which means that it can be installed in every Operating System we like. We will also need SNMP daemon (Simple Network Management Protocol) which gives us information for a network. The following installation was accomplished under Linux and specifically CentOS . With some little changes it can be used and under other distros.We will present also some simple trick on how to monitor multi services (domain,IP,host,etc) in a single output page.It is not different with polling all the packets either from udp or tcp tunnel and let the sequence or arrangemeng followed to simple network management protocol-SNMP

I hope that this doc is easy for every reader to follow the howtos of deploying the MRTG server.

Good Luck to all Parekoy!

Objectives:
1)Basically we need to setup a network monitoring software
2)To use an Opensource MRTG which is durable and tested
3) To be able to configure and setup MRTG
4)To Monitor multiple traffic activities of different servers running in the productions

Requirements:
Some of the nescessary files need to create a graphical multi router traffic analysis are the following
SNMP-protocol
GD-graphics
LibPNG -libraries to *.png format
Zlib- some addons to graphics
Wget- uploading/downloading programs

Methodology:

Installation of SNMP server
Initially we install the packets needed for SNMP. Yum makes this job a lot easier.Next we make snmpd service to start automatically for the runlevels we want.

# yum install net-snmp-utils net-snmp

And we start the server.

# chkconfig --level 345 snmp

We can see that it is running in port 199.

# service snmpd start

# netstat -natv | grep ':199'

tcp 0 0 127.0.0.1:199 0.0.0.0:* LISTEN

SNMP Configuration
We run ‘snmpwalk’ which creates a “tree” of information for our network.
If you see an output like this one you may proceed with the MRTG installation. Else you should make some configuration first.

# snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

ip.ipAddrTable.ipAddrEntry.ipAdEntIfIndex.127.0.0.1 = 1

ip.ipAddrTable.ipAddrEntry.ipAdEntIfIndex.192.168.0.3 = 2

We keep a backup of snmpd.conf just in case anything goes wrong

# cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.origina

We open it

# nano /etc/snmp/snmpd.conf

find and change this line

com2sec notConfigUser default public

replace by

com2sec local localhost public

com2sec mynetwork 10.0.0.0/8 public

where 10.0.0.0/8 we put what our network is
find and change those lines

group notConfigGroup v1 notConfigUser

group notConfigGroup v2c notConfigUser

and replace by

group MyRWGroup v1 local

group MyRWGroup v2c local

group MyRWGroup usm local

group MyROGroup v1 mynetwork

group MyROGroup v2c mynetwork

group MyROGroup usm mynetwor

find and change this lines

view systemview included .1.3.6.1.2.1.1

view systemview included .1.3.6.1.2.1.25.1

and replace with this one

view all included .1 8

find and change this line

access notConfigGroup "" any noauth exact systemview none none

with those lines below

access MyROGroup "" any noauth exact all none none

access MyRWGroup "" any noauth exact all all none

Finally,find and change those lines

syslocation Unknown (edit /etc/snmp/snmpd.conf)

syscontact Root (configure /etc/snmp/snmp.local.conf)

with this one (but you can change those with your own settings)

syslocation Linux, CentOS

syscontact Your_name root@localhost

Running SNMP service

We restart the server to take affect of the notices

# service snmpd restart

And we run again

# snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

Now we should see something like that

IP-MIB::ipAdEntIfIndex.10.X.Y.Z = INTEGER: 2

IP-MIB::ipAdEntIfIndex.127.0.0.1 = INTEGER: 1

Where 10.X.Y.Z is your ip address.

Installing MRTG application

Using yum...

# yum install mrtg

Configuration of our MRTG

We create the folder in which our graphs and html pages will be kept

# mkdir /var/www/html/mrtg/

And we run ‘cfgmaker’ for the configuration file to be created.

# cfgmaker --global "workdir: /var/www/html/mrtg" -ifref=ip --output /etc/mrtg/mrtg.cfg --global 'options[_]: growright,bits' public@localhost

Here you should pay notice to --output /etc/mrtg/mrtg.cfg as long as to public@localhost. With this command we tell MRTG to create a configuration file with the name ‘mrtg.cfg’ for the traffic of our computer (localhost). Instead of localhost you may put the address of any computer you may monitor as long as it runs SNMP.

Next we create our default index page

# indexmaker --output=/var/www/html/mrtg/index.html /etc/mrtg/mrtg.cfg

Configuring Apache To Work With MRTG

MRTG is useful because it can provide a graphical representation of your server's performance statistics via a Web browser.With newer versions of Fedora, Apache automatically reads the add-on files in the /etc/httpd/conf.d/ directory. With Fedora Core 1, you have to specifically configure the Apache configuration file /etc/httpd/conf/httpd.conf to find it. You can do this yourself by inserting this line at the very bottom of the main Apache configuration file before restarting Apache for the change to take effect. With Fedora Core, MRTG creates an add-on configuration file named /etc/httpd/conf.d/mrtg.conf that includes all the necessary Apache commands for MRTG to work.

[root@localhost]# include " /etc/httpd/conf.d/mrtg.cfg

Some configuration may need to be done, because by default MRTG accepts Web requests from the Linux console only. You can add your home network to the file by inserting the network on the Allow from line, or you can allow universal access by commenting out that line along with the Deny from line. This example adds access from the 192.168.1.0 network.

#Alias /mrtg /var/www/mrtg

Order deny,allow
Deny from all
Allow from localhost 10.36.128.0/32

If you want to access MRTG from the Internet, then you'll have to comment out the Deny statement and allow from all IP addresses:

#Alias /mrtg /var/www/mrtg

Order deny,allow
Deny from all

Note:**
Remember to restart Apache once you have made these modifications in order for these changes to take effect.

Compling MRTG configurations

We run the following command

# mrtg /etc/mrtg/mrtg.cfg

ERROR: Mrtg will most likely not work properly when the environmentvariable LANG is set to UTF-8. Please run mrtg in an environmentwhere this is not the case. Try the following command to start:

env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

In case you get an error like this;you have to run the above command more than once till it runs without any error. This is normal.

# env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

23-02-2007 17:28:53, Rateup WARNING: /usr/bin/rateup Can't remove localhost_2.old updating log file

# env LANG=C /usr/bin/mrtg /etc/mrtg/mrtg.cfg

Finally we open our browser and type

http://localhost/mrtg

Multiple MRTG clients

The Fedora Core MRTG installation process creates a cron file named /etc/cron.d/mrtg. This file tells the cron daemon to run MRTG using the /etc/mrtg/mrtg.cfg file every five minutes to poll your network devices. You can configure MRTG to poll multiple devices, each with a separate configuration file. Here's how:

1) Create a new configuration file using the steps from the previous section; choose a filename that is not mrtg.cfg.

2) Add a new MRTG line in /etc/cron.d/mrtg for each new configuration file you create.

[root@localhost]# vi /etc/cron.d /mrtg

0-59/5 **** root env LANG=C /usr/bin/mrtg/  etc/mrtg/server1.cfg
0-59/5 **** root env LANG=C /usr/bin/mrtg/  etc/mrtg/server2.cfg
0-59/5 **** root env LANG=C /usr/bin/mrtg/  etc/mrtg/server3.cfg

3) Run the indexmaker command, and include all of your /etc/mrtg configuration files, to regenerate your Web index page.

[root@localhost]# indexmaker --output=/var/www/mrtg/index.html
/etc/mrtg/server1.cfg  /etc/mrtg/server2.cfg /etc/mrtg/server3.cfg

4) Other versions of Linux keep their MRTG cron entries inside the /etc/crontab file. Edit this file using the same syntax as the Fedora /etc/cron.d/mrtg file, and then restart the cron daemon to re-read the configuration:

[root@localhost]# service crond restart

You could also create a script with the /usr/bin/mrtg /etc/mrtg/device.cfg entries in it and make cron run it every five minutes. This way you can just edit the script each time you add a device without having to restart cron.

After the modification in our config, let's start snmp and apache

[root@localhost]# service snmpd restart

[root@localhost]# service httpd restart

Again, to see the multiple clients of our MRTG, we open our browser and type

http://localhost/mrtg

Detail(1) MRTG download site

Detail(2)MRTG Main page

Detail(3)MRTG Weekly Traffic Analysis

Detail(4)MRTG Annual Traffic Analysis

Remarks:

Conclusions:

Load Balancer and High Availability Server

2010-06-08T06:14:00.000-07:00

INTRODUCTIONS:
Ultramonkey is one of the options

Network Captive Portal Deployment

2010-06-04T23:38:00.000-07:00

Introductions:

Objectives:

Methodology:

Remarks:

Conclusions:

Koha Linux Installation -Fedora XX

2010-05-20T02:25:00.000-07:00

Introductions:

We have now a software depositories ;what we want more are to tandem it with 'OPAC's and that our prospects -VuFind and Koha. Since Koha was very a prominent OPAC software I don't have a second options but to include it as a candidate for testing and evaluations .Another is the VuFind, as of now we have the impression that it has a more simplified version and is very promising software than its counterparts-well, let's see.

Let us first introduce Koha,this OPAC was originally developed for the Horowhenua Library Trust by Katipo Communications,New Zealand in 1999 (kiwi people). The first version of Koha went live at HLT in January 2005.And there are a lot of support being shared all around open source community with a dedicated team that enhance its bug , features and add-ons from time to time.

So now we proceed to actions ;debugging an OPAC powered by Koha-mwha!

Koha features:

-A full featured modern integrated library system (ILS).
-Award winning and open source no license fee, ever.
-Linux, Unix, Windows and Mac OS platform.
-Web Based.
-We can full integrate it into your website.
-Copy cataloging and z39.50.
-MARC21 and UNIMARC for professional catalogers.
-Tailored catalog module for special libraries.
-Use as a document manager or digital library.
-Manage online and off line resources with the same tool.
-RSS feed of new acquisitions.
-E-mail and/or text patron's overdues and other notices.
-Print your own barcodes.
-Serials management module.
-Full catalog, circulation and acquisitions system for library stock management.
-Web based OPAC system (allows the public to search the catalog in the library and at home).
-Simple, clear search interface for all users.
- Simple and comprehensive acquisition options.
- Koha is multi-tasking and enables updates of circulation, cataloging and issues to occur simultaneously.

Objectives:
To use Koha software package for online OPAC
To test Koha features
To compare Koha with VuFind
To evaluate Koha in production

Requirements:
Recommendations to install Koha:

Pentium II or a higher specs
Debian Linux package
Apache
MySQL
Perl
KOHA (http://download.koha.org/?C=N;O=D)
Software extras

Methodology:
Here are some straight forward method to succeed in installing,configuring and deploying KOHA.

1) Installing Perl compiler
root@localhost# yum install perl
root@localhost# perl-CPAN*

2) Install Perl libraries
root@localhost# yum install perl-
(Please use Yum to download and install package)
mysql-devel,
libxml2-devel, quagga
libxslt-devel, tcl, bzip2-devel, gcc, ncftp,
wget, gdbm-devel, expat-devel, tcp_wrappers ,
libicu , libicu-devel
mysql-bench
mod_auth_mysql
php-mysql
mysql-connector-odbc
mysql-devel
yaz

Please use Cpan to install and download Pearl libraries and add-ons-(the mt. Everest of installations )

install XML::SAX
install XML::LibXMLinstall XML::LibXSLT
install XML::LibXML::SAX::Parserinstall XML::RSSinstall XML::SAX::Writer
install Algorithm::CheckDigits
install Test::Pod
install Test::Pod::Coverage
install Biblio::EndnoteStyle
force install DBD::mysql
force install DBD::SQLite2install GD
install DBIinstall FreezeThaw
install CGI::Session::Serialize::yamli
install CGI::Simple
install Class::Accessorinstall Class::Factory::Util
install Date::Calc
install Sub::Name
install ExtUtils::CBuilder
install Data::ICal
install Email::Date
install HTML::Template::Proinstall HTML::Scrubber
install HTML::Template::Proinstall MARC::Recordinstall MARC::Crosswalk::DublinCore
install MARC::File::XMLinstall MARC::Charsetinstall PDF::API2
install PDF::Reuse
install PDF::Reuse::Barcode
install Lingua::Stem
install Test::Distribution
install List::MoreUtils
install MIME::Lite
install Mail::Sendmail
install POE
install Tk
install Term::ReadKey
install Event
install Curses
install Schedule::At
install Text::CSV
install Text::CSV_XS
install Text::Iconv
install Test::Differences
install JSON
install YAML::Syck
install HTTP::OAI
install Net::Z3950
Install Net::Z3950::ZOOM
install Unix::Syslog
Note: here are some of the updates during my installations
install Biblio::EndnoteStyle 0.05
install Date::ICal 1.72
install Digest::SHA 5.43
install GD 2.39
install IPC::Cmd 0.46
install Net::Z3950::ZOOM 1.16
install SMS::Send 0.05
install Text::CSV::Encoded 0.09
install e XML::LibXSLT 1.59
install XML::RSS 1.31

3) Instal Mysql and libraries
root@localhost# yum install mysql*

3-1) Configure mysql database
Set a new password
root@localhost# service mysqld stop
root@localhost# mysqld_safe --skip-grant-tables &

3-2) Connect to mysql server using mysql client
root@localhost mysql -u root password (just press enter)mysql> use mysql;
mysql> update user set password=PASSWORD("password1234") where User='root';
mysql> flush privileges;
mysql> quit;

3-3) Create Database
mysql> create database koha;
mysql> grant all privileges on koha.* to 'kohaadmin'@'localhost' identified by 'password1234';

4) Install web container (Apache)
root@localhost# yum install httpd*

5) Download and Install koha
root@localhost# wget www.koha

5-1)Install Koha(latest version)
root@localhost# cd PATH_Koha/
root@localhost# perl Makefile.Pl
root@localhost# make
root@localhost# make test
root@localhost# make install

5-2) Configure Koha:
5-2-1)Create a symlink in apache
root@localhost# ln -s /etc/koha/koha-httpd.conf /etc/httpd/conf.d/

5-2-2) To access koha on all IP(LAN/WAN)
root@localhost# vim /etc/httpd/conf.d/koha-httpd.conf
Check this in koha-httpd.conf #Opac < VirtualHost *:80 > #Intranet < VirtualHost *:8080 >

5-3) Test and browse Koha system
Client side
http://localhost:80

Administrator Side
http://localhost:8080

Detail(1) Successful installation of KOHA

Detail(2) Login

Detail(3) Installer -Step 1

Detail(4) Installer -Step 2

Detail(5) Installer -Step 2

Detail(6) Installer -Step3

Detail(7)-Installer -MARC

Detail(8)- Optional Added

Detail(9)

Detail(10)- No Zebra

Detail(11) Successful/complete installations

Detail(12) Admin control panel

Detail(13) OPAC client window

Remarks:

Well, one thing to note if the guide you are following does not continue as it was expected perhaps you should read now how the "config","make","make install" created an error display.
I would enumerate those possible problems:
1) Please identify each equivalent/appropriate version,what I mean is the contemporary dates when all of the the required packages were compiled and had worked out.

2)Please not some --prefixes (the correct path file installations)

3) You need to check if it needs you to setup environment variable or rather use "export"

4)Never ever forget to activate "MySQL" they must be running for such an applications to create its own database: field,name,tables ,user name, password -sometimes that was an inevitable case.

5)But in KOHA particularly, the tweak will much occur in the CPAN installations ; you can just cut and paste all the commands for eache package s to be installed by CPAN- and these were posted above. Try to force the installation if it does not continue on the first time of command of installing it. Otherwise it has other package dependencies needed to be compiled yet .Oh! this group of YAZ :applications(Yaz.x.y.z.tar.gz,libyaz.x.y.z and libyaz-devel.x.y.z) ,was a little bit confusing to mine so much so of its progress or development to CentOS ;painstakingly how can we find file just as where and how to fix its right version. I would rather suggest , why not KOHA used other package instead of YAZ ?I think there are alot of alternatives application in replacement to YAZ-the community should be serious about it though.

6) Here is another important tips for installing Net::Z3950::ZOOM is to try all available encryptor / decryptor in YUM. As different OS may vary names for these(so better try yum install *crypt*) instead. Perhaps also wrappers, I was enchanted resolving Z3950 files and turn it out installing this way -yum install *wrap* (oh thanks for a wild characters -KoHA is getting wild).

7)Please take note that if your web browser displayed errors "403" or "404" which mean to say that your apache web server (or common httpd) does not allow your koha url to be accessible (index.html-mainpage.pl).So try to add this line and I had my directory located here-> /usr/local/koha) and all the compiled packages.Please put and enclosing the statement below.
===================================
AllowOverride All
Options MultiViews -Indexes Includes FollowSymLinks
Order allow,deny
Allow from all
===================================
or this one
===================================
AllowOverride All
Options ExecCGI
===================================

8) Don't forget to create a "koha " database usually this is the primary cause of an error .It could be avoided this way-create a database first before installing koha.

Given:
Database = "koha"
Administrator account ="kohaadmin"
Hostname =" localhost"
Password ="password"

#mysql -u root -p
password (just press enter)

mysql>create database koha;
mysql>grant all privileges on koha.* to 'kohaadmin'@'localhost' identified by 'password';

9) Well , better install all the files required by CPAN

10) If you are using Fedora X.X version, make sure that selinux is disabled.

That is all folks!

Conclusions:
Its free but not the painstakingly hardship debugging its installations- make you stressed after a success

Customized Comercial Hi-Grade DSpace

2010-05-14T02:07:00.000-07:00