Tech blog :)

How to find ip adres on Centos OS?

2016-11-22T02:36:00.000-08:00

How to get ip address of a Centos 7 / Redhat in bash (command line)?.
It's quite simple. There a few ways. Previously you could use ifconfig command.
Now you can't use ifconfig even you install net-tools.
So how to check your server ip?
- You can simply ping your hostname
cat /etc/hostname
ping "hostname from file" ;)
- Another way is to type "ip addr show"and you and you'll get your ip address :)

[root@bareos ~]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:50:56:b4:a9:7f brd ff:ff:ff:ff:ff:ff
    inet 192.168.200.13/24 brd 192.168.200.255 scope global ens32
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:feb4:a97f/64 scope link
       valid_lft forever preferred_lft forever
3: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:50:56:b4:1b:ff brd ff:ff:ff:ff:ff:ff
4: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:50:56:b4:f9:3d brd ff:ff:ff:ff:ff:ff

What to do when your system crashes in XP mode (in hibernation or during shutdown, system reboot)?

2012-10-17T23:40:00.000-07:00

What to do when your system crashes in XP mode (in hibernation or during shutdown, system reboot)?

This is a fairly common problem. Microsoft in his goodness in general, trying to hide advanced options against inexperienced users.

Sometimes this can cause a variety of problems. For example, if your virtual machine crashes during hibernation / shutdown, is hardly what we can do with it. We can't restart our virtual computer because our virtual machine is simply a file.

After restarting the file is still saved, the system is being shut down and hibernate;)

So our virtual machine is suspended. In your virtual machine menu when you, select Action> close than by default, without any additional questions, our machine hibernates ;).

But our virtual machine is already suspended, so how to switch of XP Mode machine?. Of course, closing with a cross or "Close" does not give us anything.

We need to change the default settings for your virtual machine:

- In Windows "Start" menu go to Windows Virtual PC>Windows Virtual PC and select the file of your virtual machine by pressing the right mouse button on it.

- Select "Settings" and go to "Close". Select "prompt for action", click ok
Now, when you click close button you should see prompt for action, for example "power off" ;)

How to recover MBR (boot sector) in Windows7

2011-11-01T05:09:00.000-07:00

Recover MBR (Master Boot Record) is not a difficult task. The necessity to recover the boot sector, we are damaging the sector's situation eg by compressing the system disk in Windows7 (yes it happens;). In such a situation when you reboot your computer,you get the message "system is not installed". Let's go for repair.
1.Start MBR recovery putting Win7 installation disc into the DVD drive.
We can easily found windows 7 recovery disc (its miniature version, along with the recovery console) by typing in Google:
windows 7 recovery disc download

- After rebooting the computer and boot from the installation (of course you must start the computer with a DVD drive and press the button to go to the installation) to select the regional settings, keyboard type, and go further
- Click on "Repair Your Computer" or type r
- Wait until the next window appears, where we choose the command line (Command Prompt)
- Write bootrec.exe / fixmbr. After a moment, press enter and after a reboot we see the bootloader screen to choose the operating system :)
Our boot sector has been recovered
If the above method does not work we must again go through the above steps until your command line.
- Type bootsect / nt60 c:\ (c:\ this is our system partition if you have installed the system on c:), hit enter and restart your computer
- If the above command does not work again go through all the steps and enter bootsect / nt60 SYS, enter and restart
- If the above does not work this time prompt, type bootsect / nt60 ALL, enter and restart
This all folks, of course, remember to remove the DVD media before You restart computer :).

How to transfer files from Windows 2003 to 2008 with permissions?

2011-10-12T04:03:00.000-07:00

Moving files from Windows server 2003 to 2008 is a simple matter. Really matters is that the files were stored on an NTFS partition and not the version of the system.
If you copy files using Windows Explorer that permissions can be changed to whatever is the destination folder. More precisely, if you copy the files within the same volume permissions do not change. You become a creator-owned. If you copy to another volume permission are inherited from the parent folder. If you copy the example file using Total Commander you can tick the option "Copy NTFS Permissions" (the old permissions will be transferred).
We can also copy our files using xcopy.
For example, the command: xcopy source destination / O / X / E / H / move files with NTFS permissions from the source server to the destination.

How to install (configure) syslog?

2011-10-11T03:29:00.000-07:00

Syslog is a standard login (service) information from network devices (router, pix), Unix hosts,
printers ...
Events can be logged either locally or remotely on the syslog host .
Syslog allows the separation of applications, operating systems .. from the host on which the logged events are stored.
This is a very useful feature because it can be for example:
- In case of system failure to check the smooth running of the event was preceded by a host crash
- In many hardware solutions, there is no enough place for store logging events. If you have configured syslog, it is not problem behavior logs over the years
- Syslog is also very useful in case of intrusion, both external, internal and if necessary
use of logged data such as in court.
Syslog installation is not difficult. Possibly a little more difficult to configure the log distribution (arrangement) for each day of the month, year .. but we can handle this.

Stages of installation (configure logging for pix'a cisco).
1. Will do the installation on Debian (a Linux operating system).
- Start with the updates (you do not have to do it;)
aptitude update
aptitude upgrade
- Install syslog-ng
aptitude install syslog-ng
- Install openssl stunnel
aptitude install openssl stunnel
- After installation, edit the configuration file
nano /etc/syslog-ng/syslog-ng.conf and at the end add:

source net { udp(ip(0.0.0.0) port(514)); }; #0.0.0.0 will allow all hosts to send their logs to your host.
destination d_cisco { file("/var/log/cisco/$YEAR.$MONTH.$DAY/cisco.log"); };
filter f_cisco_info { level(info); };
filter f_cisco_notice { level(notice); };
filter f_cisco_warn { level(warn); };
filter f_cisco_crit { level(crit); };
filter f_cisco_err { level(err); };
filter f_cisco_debug { level(debug); };
log { source(net); filter(f_cisco_info); destination(d_cisco); };
log { source(net); filter(f_cisco_notice); destination(d_cisco); };
log { source(net); filter(f_cisco_warn); destination(d_cisco); };
log { source(net); filter(f_cisco_crit); destination(d_cisco); };
log { source(net); filter(f_cisco_err); destination(d_cisco); };
log { source(net); filter(f_cisco_debug); destination(d_cisco); };

- Thanks to this we were able to configure the syslog (in a simplified way), so that port 514 (syslog port official) receive the information logged.

- We can restart our syslog

/etc/ init.d/syslog-ng stop

/etc/init.d/syslog-ng start

- We can configure the login for our device. For example, if your syslog host address is 192.168.1.100 in this example, Cisco pix type command:

- Enable logging:

logging host inside 192.168.1.100

so briefly, of course we have to choose the login detail, or interface

- We can preview our current log

tail /var/log/cisco/(current date)/cisco.log

- Login now works, but as it usually is, not every day we look for logged events. Sometimes it can be a very

long time, during which our logs will grow to exorbitant size of a directory structure to expand beautifully;)

To avoid this, install logrotate and introduce a little order into our system.

- aptitude install logrotate

logrotate is a program dealing with log rotation

- Edit configuration

nano /etc/ logrotate.conf

# rotate log files weekly

weekly

# keep 4 weeks worth of backlogs

rotate 4

# create new (empty) log files after rotating old ones

create

# uncomment this if you want your log files compressed

compress

# packages drop log rotation information into this directory

include /etc/logrotate.d

# no packages own wtmp, or btmp -- we'll rotate them here

/var/log/wtmp {

missingok

monthly

create 0664 root utmp

rotate 1

}

/var/log/btmp {

missingok

monthly

create 0660 root utmp

rotate 1

}

# system-specific logs may be configured here

- To start logrotate type (force start)

logrotate -f

- If we want rotate only syslog then you would run

logrotate -f /etc/logrotate.d/syslog-ng

That's all, our logon service works. Of course, your configuration may be significantly more sophisticated.

For the it professionals working abroad

2011-10-09T13:02:00.000-07:00

A word of advice for working abroad. How cheaply transfer money from abroad?
Offer transfers from abroad is very rich and really is the pick.
If you are working abroad, you or your family is probably looking for a company that does not rip one of you for a transfer while the transfer of foreign operations account will be painless.
With a wide range of interested me most MoneyBookers account on why below quotes from their site:

Key features:

Fully integrated worldwide banking network, provides more than 100 payment options, with 41 currencies covering 200 countries and territories
Sophisticated internal risk and fraud management
Transparent fee structure
Multi-language website and customer service
First licensed e-money issuer in the UK authorised and regulated by the FSA
Cost-effective, offering competitive prices and unique proven benefits

Advantages to consumers:

Instant deposits and withdrawals
Send money globally for only 1% or €0.50, whichever is less
Market-leading security, protecting personal data
Wide range of payment options
Prepaid MasterCard® offers extra flexibility

Advantages to businesses:

Direct processing of credit and debit cards
One contract and one interface offers 100 payment and banking options
Facilitates substantial increase in customer conversion and acquisition rates
Free risk checks and anti-fraud management
Marketing access to over 19million account holders

Making Money on Facebook?

2011-10-06T03:43:00.000-07:00

On Facebook, you can make money in different ways:

- You can lead Advertising campaigns for companies
- You can also write posts and articles
- You can help establish Fanpage

Recently I came across the website fanslave, which is interesting. In this site they paying registered facebook users for clicking "like it" on the site ((fanpages targeted by fanslave owners. (the company has a fanpage and fanslave pays for the fact that we click for them on "I like it ".))
Quote from fanslave:

"FanSlave is a ground-breaking new service, which was designed to revolutionize the marketing of Fanpages. With our easy connection system you can increase the growth of your social network and therefore increase the people following your brand, your company or product."

Really interesting, especially becouse at the beginning we get some credits and page to like:)
If you fall into any other ideas on how you can earn on facebook type in comments.
ps.You can also use fanslave to get users to your fanpage

How to add to Joomla - Facebook "I like it" (and Google+)

2011-10-06T02:18:00.000-07:00

Adding links in Joomla to Facebook is a simple matter. You can use ready-madeextensions that will do it for us, but more flexible will be to modify the Joomla code.In this way we will decide exactly where you will find our Facebook buttons.
Below are some examples of modification obtained with the help of one of the forum members (link to his web page http://www.landkiting.pl/).

In our examples we use a modified button "f add to wall" (you should create your custom icon), which looks a little different than the standard "I like it." In addition, we use the standard "f" button. We save the image files to / images / icons / (or any folder created by you).
(Note we can also use the following article to add a google+ button. For example, before facebook button, typing <g:plusone> </ g: plusone> and on the main page in the head section </ script> {lang: 'en'} <script type="text/javascript" src="https://apis.google.com/js/plusone.js">)

- Let's insert Facebook button on our home page in Joomla.
We need to edit the file (for example, after logging in via ftp / ssh, etc. .. on our server) is located
in components / com_content / views / frontpage / tmpl / default_item.php. Bellow the lines:

<?php if ($canEdit || $this->item->params->get('show_title') || $this->item->params->get('show_pdf_icon') || $this->item->params->get('show_print_icon') || $this->item->params->get('show_email_icon')) : ?>

<table class="contentpaneopen<?php echo $this->escape($this->item->params->get( 'pageclass_sfx' )); ?>">

<tr>

<?php if ($this->item->params->get('show_title')) : ?>

<td class="contentheading<?php echo $this->escape($this->item->params->get( 'pageclass_sfx' )); ?>" width="100%">

<?php if ($this->item->params->get('link_titles') && $this->item->readmore_link != '') : ?>

<a href="/<?php echo $this->item->readmore_link; ?>" class="contentpagetitle<?php echo $this->escape($this->item->params->get( 'pageclass_sfx' )); ?>">

<?php echo $this->escape($this->item->title); ?></a>

<?php else : ?>

<?php echo $this->escape($this->item->title); ?>

<?php endif; ?>

</td>

<?php endif; ?>

add:

<a target="_blank" href=http://www.facebook.com/share.php?u=your site address without the http at the beginning<?php echo $this->item->readmore_link; ?> title="Add to Facebook" ><img src="/images/icons/facebook.png" border="0" alt="Dodaj do Facebook`a"></a>

</td>

and now we have a beautiful button "f add to wall" :)
- If you want to add a button to each new article well enough to modify a file in components / com_content / views / article / tmpl / default.php. Bellow the lines:

<table class="contentpaneopen<?php echo $this->escape($this->params->get('pageclass_sfx')); ?>">

<tr>

<?php if ($this->params->get('show_title')) : ?>

<td class="contentheading<?php echo $this->escape($this->params->get('pageclass_sfx')); ?>" width="100%">

<?php if ($this->params->get('link_titles') && $this->article->readmore_link != '') : ?>

<a href="/<?php echo $this->article->readmore_link; ?>" class="contentpagetitle<?php echo $this->escape($this->params->get('pageclass_sfx')); ?>">

<?php echo $this->escape($this->article->title); ?></a>

<?php else : ?>

<?php echo $this->escape($this->article->title); ?>

<?php endif; ?>

</td>

add:

<a target="_blank" href=http://www.facebook.com/share.php?u=your site address without the http at the beginning<?php echo $this->item->readmore_link; ?> title="Add to facebook" ><img src="/images/icons/facebook.png" border="0" alt="Add to Facebook"></a>

</td>

- We can also add a menu button to display a list of articles in the category. We need to edit the file components / com_content / views / category / tmpl / default_item.php and insert code:

<?php foreach ($this->items as $item) : ?>

<tr class="sectiontableentry<?php echo ($item->odd +1 ) . $this->escape($this->params->get('pageclass_sfx')); ?>" >

<?php echo $this->pagination->getRowOffset( $item->count ); ?>

</td>

<?php if ($this->params->get('show_title')) : ?>

<?php if ($item->access <= $this->user->get('aid', 0)) : ?>

<td>

<?php echo $this->escape($item->title); ?></a>

<?php $this->item = $item; echo JHTML::_('icon.edit', $item, $this->params, $this->access) ?>

your site address without the http at the beginning<a target="_blank" href=http://www.facebook.com/share.php?u=

<?php echo $this->item->readmore_link; ?> title="Add to facebook" ><img src="/images/icons/facebook1.gif" border="0" alt="Add to facebook"></a>

</td>

That's it folks ;)

Apache restart using crontab

2011-10-05T00:44:00.000-07:00

If you have problem with your Apache server (for example when your server hang from time to time)this may be associated with too many apache processes. If the server crashes from time to time it is a hassle for you and your Customer.
You can add RAM to your server, but not sure if this will solve the problem.
A better method is to add the crontab job that will restart the Apache process (You should also upgrade your Apache version).
Download Video Tutorial
Let's start:
- login as root to your apache server (you can use ssh, direct access, webmin etc.)
- type crontab -e to edit crontab
That will put you in the Vi editor editing your crontab. The Vi keystrokes you need to edit your crontab are: "i" for insert (or insert key), then type out your cron line following the format below , then press the "escape" key on your keyboard to get out of insert mode, then ":" to get a prompt, then "wq" and then "enter" and it is saved.
- in the last line type
5 0 * * * /etc/init.d/httpd restart >/dell/null 2>&1
Run at 5 minutes after midnight, every day (restart apache)
- save crontab esc : wq! and exit
it's all
ps. if you start Apache using then type in crontab
5 0 * * * /usr/local/apache/bin/apachectl restart
or 5 0 * * * /usr/sbin/apachectl restart

Psexec commands, usage

2011-10-04T05:54:00.000-07:00

PsExec is one of the tools in the excellent PsTools package suite . It is a command line tool allowing the execution of processes on a remote system and transfer the results of operations to the console (to your computer) To work PsExec needs on the local and remote computer file and printer sharing and remote system service should be enabled and also default administrative share Admin $.

To start, download PsTools to your computer and then unpack to a directory eg c: \.

Then enter the command line (cmd), go to the directory c: \ PsTools and we can use psexec.exe.

Generally, if you have administrative privileges for easest use, you can copy files in the directory PsTools to% systemroot% \ system32.

This enables us regardless of our position in the hierarchy of folders, use the commands contained in the package.

Examples of use psexec:

The name of the remote computer (SCA)

- Run a command prompt on the remote computer

psexec \ \ cmd SCA

- Run the show network settings on a remote computer and pass this information to local console command line

psexec \ \ SCA ipconfig / all

- These commands were performed assuming that you run from an account that has administrative privileges on the second computer also. In another situation, we must specify the administrator login and password.

Here is an example remote shutdown.

psexec \ \ SCA-u username-p password shutdown

- The following command will copy the program to the remote computer and run it interactively

psexec \ \ SCA-u username-p password-cc: \ jakas_sciezka \ program.exe
- Setting the firewall on a remote computer to allow you to connect remote desktop

psexec \ \ SCA - u user-p password netsh firewall set service enable remotedesktop

- Displays detailed information about processes on a remote computer

psexec \ \ SCA - u user-p password tasklist / v

How to format FAT32 external drive - Windows

2011-10-02T12:07:00.000-07:00

If you want to format the portable drive (if you wan't for example, connect to the DVD player) on a FAT32 file system when its size is over 32GB, we encounter an unexpected problem. Windows will not allow us to format the drive in FAT32 instead of NTFS format will propose. To circumvent the problem, we can use a boot disk and format the drive but it would be too burdensome. - Instead, download the fat32format.zip (by which format the 1TB drive for example) and unpack it to any path. Then enter the command prompt (start menu> run> "cmd"). You should log on as an administrator or run the command line by going to Start> Programs> Accessories and select right-click "Command Prompt" and from the context menu choose "Run as administrator" We should check twice what the drive letter of your disk is going into eg the Computer Management> Disk Management, or by using diskpart - Navigate to the path where you unpack file for example by typing cd C: \ Documents and Settings \ user \.
- Type fat32 format g: (if your portable drive letter is g:) After a while, your disk is formatted

How to open, convert the DAA file

2011-10-01T07:27:00.000-07:00

DAA (Direct Access Archive) is an image file format created for the PowerISO program. This format provides compression, password protection, divid into multiple volumes. PowerISO is a great application, but paid.It's very difficult to find a free program that supports this file type.
But after what they hinder? We can convert the Daa file to iso using a free program DAA2ISO

In brief:
1.We download DAA2ISO file and unpack Zip file
2.Run daa2iso.exe and select *.daa file from your file system.
3.We show where to save the converted file iso. After the conversion is complete press enter and that's it ;)

From now on we can burn the iso file to disc, eg free ImgBurn (also for commercial use), or mount a free MagicDisc (also for commercial use (as opposed to the daemon-tools, which is free only for home use;))

Jak blogować za darmo i zarabiać

2011-09-30T07:09:00.000-07:00

W sumie sam nie wiem co odpowiedzieć na to pytanie ponieważ jest to mój pierwszy nowiutki wpis.
Do tej pory nie blogowałem ale trafiłem na ciekawy wpis na http://tomasz.topa.pl/dreamhost-apps-darmowy-hosting-dla-wordpress-drupal-wiki-i-phpbb.html , który mnie zaciekawił ponieważ od razu zaproponował aż 2 platformy blogowe. Muszę przyznać, że najpierw założyłem konto na dreamhostapps.com. Cały proces zakładania konto nie był skomplikowany choć muszę przyznać iż bogactwo tego darmowego (chociaż wersja płatna nie jest droga) serwisu trochę mnie zaskoczyło ponieważ od razu dostajemy nie tylko możliwość instalacji wordpress ale również drupala, CMS Drupal, MediaWiki, forum phpBB czy galeria ZenPhoto, Google Apps z możliwością założenia w darmowej wersji 10 użytkowników. Muszę sam się w tym wszystkim po orientować ale napewno napiszę o moich wrażeniach. Na razie już jestem zadowolony z WordPress ponieważ swoje konto założyłem niesamowicie szybko i po chwili już piszę do Was.
To co powyżej to cytat z bloga na Wordpress, którego założyłem i niestety od razu opuściłem ponieważ niestety okazuje sie, że pomimo, że platforma blogowa na wordpress.com jest świetna też w wersji darmowej (ograniczenie miejsca do 1GB), to nie można zarabiać na reklamach Google AddSense.
Czyli bez sensu. Najlepszy blog to darmowy czyli taki jak na http://www.blogger.com/ i jednocześnie taki na którym można zamieszczać reklamy.
No to zaczynamy :)