Ubuntu is a free, open-source computer operating system with 20 million users worldwide.

This 30 page guide was written for beginners and will tell you everything you need to know about the Ubuntu experience. You will learn how to install and setup Ubuntu on your computer, find technical support in your community, understand the Ubuntu philosophy, navigate the Unity desktop interface and use Ubuntu compatible software programs. Also with this free guide you will receive daily updates on new cool websites and programs in your email for free courtesy of MakeUseOf.

User/group management
User/group permissions management per path
SVN repositories creation
Config files for apache2 cgi and wsgi created automatically
Authentication via htpasswd/svn authz
Authentication synced to svn (and trac)

Tested with browsers:

Firefox (2, 3)
Safari (3)
Internet Eplorer (7,
Note: IE6 is not supported
Opera
Chrome

Reported to work on:

Debian (etch, lenny, squeezy)
Ubuntu
OS X
CentOS

Install submin on ubuntu

open /etc/apt/sources.list file

#vi /etc/apt/sources.list

Add the following line

deb http://debian.supermind.nl/ current main

Save and exit the file

Need to add the key

#wget -q -O - http://supermind.nl/debian.key | apt-key add -

Update the source list

#apt-get update

Install submin

#apt-get install submin

Screenshot

QupZilla is modern web browser based on WebKit core and Qt Framework. WebKit guarante fast browsing and Qt availability on all major platforms.

Features

Native look’n’feel

QupZilla is using native widgets style on major Linux Desktop Environments. It is also using icons from active desktop icon theme. If you find native theme too boring or have some problems with it, you can always switch to other themes.

Unified Library

QupZilla unifies bookmarks, history and rss reader in one well-arranged window. No more multiple windows, QupZilla uses just one!
With integrated rss reader, you can stay up to date with your favourite sites. QupZilla can also import bookmarks from other browsers.

Integrated AdBlock

Are you bored of websited full of advertisements? Are they eating your bandwidth and time? The only thing you need with QupZilla is to update EasyList or maybe add your own rules and start

Install QupZilla in debian

First you need to download deb package from here once you have deb package you can install by double clicking on it

Screenshot

Oracle VM VirtualBox, formerly Sun xVM VirtualBox and innotek VirtualBox, is a family of x86 virtualization products for enterprise and home use.VirtualBox is a general-purpose full virtualizer for x86 hardware, targeted at server, desktop and embedded use.

What is new in virtualbox 4.1.8

This is a maintenance release. The following items were fixed and/or added:

VMM: fixed VERR_MAP_FAILED during savestate under certain circumstances (bug #7929)
GUI: stop updating the VM status icons when the VM is paused (bug #8368)
VBoxManage: fixed wrong return code after startvm (bug #9642)
BIOS: fixed hang at launch of DOS applications generated by Clipper 5.3 (note that hardware virtualization may be required)
USB: fixed OS/2 boot hang when using recent USB drivers
NAT: increase maximum number of parallel connections making connections with port forwarding more robust (#8471)
Metrics: fixed potential problem with invalid access in guest metrics collection upon VM destruction
Main: don’t crash if a medium is ejected twice (bug #9922)
VBoxSVC: fixed crash under rare circumstances (e.g. client crash)
VRDP: fixed screen freeze (bug #9620)
OVF/OVA: fixed broken disk images on import under rare circumstances
OVF/OVA: better error message when importing corrupted appliances
VMDK/VHD: fixed a possible corruption with host cache disabled when using snapshots under rare circumstances (bug #9749)
3D Support: Fixed fullscreen mode issues for ATI graphics (bug #9775), Windows Media Player rendering for XPDM-based Direct3D support (bug #8341). Multiple fixes to XPDM and WDDM - based 3D support for Windows Guests and for 3D support in general
Linux hosts: fixes for Fedoras Linux 2.6.41 (bug #9948)
Linux hosts/guests: fixes for Linux 3.2 (bug #9743)
Solaris Additions: various shared folder fixes (bugs #9856, #9862, #9917)
Windows Additions: various fixes for Direct3D support (un)installation, added detection of missing or wrong Direct3D system files

Install virtualbox 4.1.8 on debian 6

You need to edit /etc/apt/sources.list

gksudo gedit /etc/apt/sources.list

Add the following line

deb http://download.virtualbox.org/virtualbox/debian squeeze contrib non-free

Save and exit the file

wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -

Update source list

apt-get update

Install virtualbox

apt-get install virtualbox-4.1

Note: Debian users might want to install the dkms package to ensure that the VirtualBox host kernel modules (vboxdrv, vboxnetflt and vboxnetadp) are properly updated if the linux kernel version changes during the next apt-get upgrade. For Debian it is available in Lenny backports and in the normal repository for Squeeze and later. The dkms package can be installed through the Synaptic Package manager or through the following command:

apt-get install dkms

Access Your Complimentary Copy Today. This $9.95 Value eBook Expires 12/6/2011.

Each of us is now faced with the daunting task of protecting ourselves and our families in the virtual worlds we travel. To make the job a bit easier, the editors of the Windows Secrets Newsletter have compiled some of the best security stories from their archives.

The PC Security Guide is a concise eBook that provides simple and straight forward advice for secure computing. It’s designed to give you the fundamental tools you’ll need to protect your PC and personal information from most online threats.

With this free PC Security Guide you will also receive a weekly newsletter delivered to your inbox courtesy of Windows Secrets Newsletter.

This tutorial describes how to back up and restore your BIG-IP version 11.0.0 configuration data using a UCS configuration archive. The UCS archive by default contains all files required to restore your current configuration to a new system, including configuration files, the product license, local user accounts, and SSL certificate/key pairs.

By default, the BIG-IP system will save the UCS archive file with a .ucs extension if you do not include it in the filename. You can also specify a full path to the archive file, and the archive file will be saved to the specified location. If you do not include a path, the file will be saved to the default archive directory, /var/local/ucs. Archives located in a directory other than the default will not appear in the list of available archives when using the Configuration utility to create/restore a UCS archive or when using the list /sys ucs command in the tmsh shell. F5 recommends that you include the BIG-IP hostname and current timestamp as part of the filename for ease of identification.

Backing up configuration data using the Configuration utility

1) Log in to the Configuration utility.

2) Navigate to System >> Archives >> Archives List.

3) Click the Create button to initiate the process of creating a new UCS archive.

4) Type a name for the file in the File Name box.

5) Optional: If you want to encrypt the UCS archive file, select Enabled from the Encryption drop-down menu and enter a passphrase. This passphrase must be supplied in order to restore the encrypted UCS archive file.

6) Click the Finished button to start the creation of the UCS archive file.

7) When the backup process is done, examine the status page for any errors reported before proceeding to the next step.

8 ) Click the OK button to return to the Archive List page.

9) Copy the .ucs file to another system.

Restoring configuration data using the Configuration utility

1) Log in to the Configuration utility.

2) Navigate to System >> Archives >> Archive List.

3) rom the Archive List, click the name of the UCS archive that you want to restore.

4) If the UCS archive is encrypted, you will need to type the passphrase for the encrypted UCS archive file in the Restore Passphrase field. If the UCS archive is not encrypted, you can skip this step.

5) Click the Restore button to initiate the UCS archive restore process.

6) When the restore process is completed, examine the status page for any errors reported before proceeding to the next step.

7) Click the OK button to return to the Archive List page.

8 ) If you restored the UCS archive on a different device and received the errors noted in the Considerations for restoring configuration data section, you must reactivate the BIG-IP system license.

9) After relicensing the system, reboot the system to ensure the configuration is fully loaded. To reboot the system, browse to System >> Configuration and click the Reboot button.

10) If the system you have restored contains the FIPS 140 HSM, you must configure the FIPS 140 HSM Security World after completing steps 1 to 9.

Restore 6400, 6800, 8400, or 8800 hardware platforms

If you are running 6400, 6800, 8400, or 8800 hardware platform you have to use tmsh utility for restore

1) Log in to the Traffic Management Shell (tmsh) by typing the following command:

tmsh

Note: If you are currently logged in to the tmsh shell, you can skip this step.

2) Restore the UCS archive file by using the following command syntax, replacing with the full path of the UCS archive file you want to restore:

load /sys ucs

If you do not specify the path, the BIG-IP system assumes the UCS archive file is located in the default /var/local/ucs directory.

3) If the UCS archive file was encrypted with a passphrase during the backup, you will be prompted to enter the passphrase for the archive file.

4) If you are running BIG-IP on a 6400, 6800, 8400, or 8800 hardware platform, type the following command to switch to bash shell:

run /util bash

5) Type the following command to verify that the new or replaced SSH keys from the UCS file are synchronized between the BIG-IP and the SCCP:

keyswap.sh sccp

6) Type the following command to switch back to the tmsh shell:

exit

7) Reboot the system by typing the following command:

reboot

you must reactivate the BIG-IP system license. Alternatively, you can replace the /config/bigip.license file with the original bigip.license file you backed up from the target system.

8 ) If the system you have restored contains the FIPS 140 HSM, you must configure the FIPS 140 HSM Security World after completing steps 1 to 5.

When trying to connect to a remote host using LogMeIn, connections are never established when intercepted by ProxySG.

This happens when the following are true:

The ProxySG has a valid SSL license
Either service port 443 is set to intercept SSL or in explicit mode HTTP service has detect protocol enabled

The problem happens because when connecting to a remote host using LogMeIn, there is a connection made by the client to a server on TCP port 443 that is not actually using SSL protocol. When the ProxySG detects this, it breaks the connection and logs an error to the event log as shown below:

2011-09-09 11:09:51-04:00EDT “Non-SSL client protocol detected(error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol)” 0 300000:1 sslproxy_worker.cpp:3051

Resolution

For explicit mode

Disable protocol detection for requests to the logmein.com domain. Use the steps below to install the CPL example:

Go to ProxySG Management Console>Configuration>Policy>Policy Files>Install local file from:
Select Text Editor from the drop-down list
Click Install
Paste the following CPL to the bottom of the text editor

<proxy>
url.domain=logmein.com detect_protocol(none) allow

Click Install

For transparent mode

Create a TCP tunnel service for the subnet that belongs to LogMeIn where the server in question resides.

Go to ProxySG Management Console>Configuration>General>Achive>Archive Configuration>Install Configuration From:
Select Text Editor from the drop-down list
Click Install
Delete all the existing contents in the Text Editor (Ctrl A, Del)
Paste the configuration as shown below

proxy-services ;mode
create tcp-tunnel “LogMeIn”
edit “LogMeIn” ;mode
add all 216.52.233.0/24 443 intercept
exit

Click Install

Easy, browser-based Linux/UNIX administration with Webmin--step by step.
Long Description: Webmin gives you an easy, browser-based solution for virtually any day-to-day Linux/UNIX administration task. Now, there’s a definitive Webmin guide for every beginning-to-intermediate sysadmin. Written by Webmin’s primary developer, Managing Linux® Systems with Webmin™; delivers authoritative, step-by-step coverage of the latest version of Webmin, from basic installation to centrally managing multiple servers. Coverage includes:

How Webmin works--and how to install and secure it
Using Webmin to configure basic system services, including file systems, users/groups, and printing
Configuring Apache, Sendmail, Squid, Samba, MySQL, PostgreSQL, FTP services, and more
Cluster modules: configuring multiple systems from one master server
Webmin modules: configuring Webmin itself
Full API documentation and instructions for writing your own Webmin modules and themes

Jamie Cameron walks you through more than 50 essential Webmin tasks--offering all the background you need, step-by-step instructions, extensive screen captures, and listings of the underlying configuration files that are being modified. Whether you’re new to Linux/UNIX system administration or you simply want an alternative to the command line, Managing Linux® Systems with Webmin™ will be an indispensable resource.

The Ubuntu team is pleased to announce Ubuntu 11.10 Beta 2.Codenamed “Oneiric Ocelot”, 11.10 continues Ubuntu’s proud tradition of integrating the latest and greatest open source technologies into a high-quality, easy-to-use Linux distribution. The team has been hard at work through this cycle fixing bugs and introducing a couple of new features as we polish up for the release.
Ubuntu Changes since Beta 1

Ubuntu 11.10 screenshots gallery

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VirtualBox is a free, open source, cross-platform application for creating, managing and running Virtual Machines (VMs).

You’ve heard a lot about Linux and you’d love to try it out, but you don’t know enough to take the plunge and install it alongside Windows - maybe you’re worried you’ll wipe all your files off in the process. Besides, you’d like to have another computer handy so that you can look something up if you get stuck, but you don’t have another computer. This is it.

Or maybe it’s the opposite. Perhaps you’ve taken a step out of your comfort zone and ditched Windows - maybe for Ubuntu, or maybe for Mac OS X. You feel liberated! No more Blue Screens of Death! You’re living life on the edge, getting on with your work… and then you come to a screeching halt. You discover that a piece of software crucial to your workflow runs on Windows… and only Windows.

Whatever shall you do? Then somebody introduces you to VirtualBox. Suddenly you gain the power to conjure virtual computers out of thin air. They don’t take up space on your desk, yet they work just like a real computer does. They can be conjured up and removed with little more than a few clicks. Intrigued? Also with this free guide you will also receive daily updates on new cool websites and programs in your email for free courtesy of MakeUseOf.

This paper examines how to smoothly transfer content, users, interface, and metadata to Drupal.

Drupal’s advantages for running enterprise web sites are well established by such companies as FedEx, The Economist, and The White House. But many who would like to use it hesitate because they fear loss of assets now managed by their current site’s platform, or expect the procedure to transfer those assets to be prohibitively difficult. This paper examines scenarios for migrating from other Content-Management Systems (CMSes) such as Vignette, Jive, FatWire, ColdFusion, and Joomla. It evaluates reasons for migration, describes migration methods and tools, and suggests best practices.

Linux is the fastest-growing Java development platform because it saves money and time by serving as a platform for both development and deployment. But developers face significant platform-specific challenges when managing and deploying Java applications in a controlled production environment.

Written for Java and Linux developers alike, Java™ Application Development on Linux® is the hands-on guide to the full Java application development lifecycle on Linux.

Determined to spare other developers hours of trial and error, Albing and Schwarz demonstrate the platform, tools, and application development by showing realistic, easy-to-follow examples. After a simple command-line application introduces basic tools, this program leads readers through business-logic object analysis, database design, Java servlet UIs, Java Server Pages (JSP) UIs, Swing GUIs, and Standard Widget Toolkit (SWT) GUIs. Scaling up to the enterprise level provides the opportunity to use both the JBoss Application Server and the Apache Geronimo Application Servers, and Enterprise JavaBeans (EJB).

Readers learn how to:

Use development tools available on Linux, such as the GNU Compiler for Java (gcj), Ant, the NetBeans IDE, IBM’s Eclipse Java IDE, JUnit, and SunONE Studio
Develop business logic layers using Java DataBase Connectivity (JDBC)
Add a Web interface using servlets and JSPs
Add a GUI using Sun’s Abstract Window Toolkit (AWT) and IBM’s SWT
Deploy EJBs in Linux

The authors conclude by demonstrating how a hierarchy of budgets can be created, tracked, and shared with Concurrent Versions System (CVS). Java™ Application Development on Linux® can propel you from a standing start to the full-speed development and deployment of Java applications on Linux.

When you try to configure trunk port you might see following error

An interface whose trunk encapsulation is Auto can not be configured to trunk mode

To fix this you need set encapsulation to 802.1q using the following command

conf t

int gi4/10

switchport trunk encapsulation dot1q

This should fix your issue

The indispensable start-to-finish troubleshooting guide for every Linux professional.
Long Description: Now, there’s a systematic, practical guide to Linux troubleshooting for every power user, administrator, and developer. In Self-Service Linux®, two of IBM’s leading Linux experts introduce a four-step methodology for identifying and resolving every type of Linux-related system or application problem: errors, crashes, hangs, performance slowdowns, unexpected behavior, and unexpected outputs. You’ll learn exactly how to use Linux’s key troubleshooting tools to solve problems on your own--and how to make effective use of the Linux community’s knowledge.

If you use Linux professionally, this book can dramatically increase your efficiency, productivity, and marketability. If you’re involved with deploying or managing Linux in the enterprise, it can help you significantly reduce operation costs, enhance availability, and improve ROI.

Series Editor Bruce Perens’ is an open source evangelist, developer, and consultant whose software is a major component of most commercial embedded Linux offerings. He founded or cofounded Linux Standard Base, Open Source Initiative, and Software in the Public Interest. As Debian GNU/Linux Project Leader, he was instrumental in getting the system on two U.S. space shuttle flights.

Few frontline system administrators can afford to spend all day worrying about security. But in this age of widespread virus infections, worms, and digital attacks, no one can afford to neglect network defenses.

Written with the harried IT manager in mind, Open Source Security Tools is a practical, hands-on introduction to open source security tools. Seasoned security expert Tony Howlett has reviewed the overwhelming assortment of these free and low-cost solutions to provide you with the “best of breed” for all major areas of information security.

Inside, you’ll find everything from how to harden Linux and Windows systems to how to investigate breaches with Sleuth Kit, Autopsy Forensic Browser, and Forensic Tool Kit. For each security task described, the author reviews the best open source tools and how to use them and also provides a case study and sample implementation. Covered tasks include:

Installing an open source firewall using Ipchains, Iptables, Turtle firewall, or Smoothwall
Scanning ports and testing for vulnerabilities
Using Nmap, Nlog, Nmap for Windows, Nessus,and NessusWX
Using sniffers and network-intrusion systems, including Tcpdump, Ethereal, Windump, Snort™, and Snort™ for Windows
Tracking and analyzing collected data with Swatch, ACID, and NCC
Encrypting communications with PGP, GnuPG, SSH, and Free S/WAN

This handy reference also tackles the emerging field of wireless security and covers tools such as Kismet Wireless, Airsnort, and Netstumber.

Whether you’re a Windows system administrator or a network administrator, you will come away with an understanding of how open source security tools can help protect your organization and further your own career.

An indispensable ebook for every Linux administrator!

Instant access to precise, step-by-step solutions for every essential Linux administration task from basic configuration and troubleshooting to advanced security and optimization.

If you’re responsible for delivering results with Linux, Linux® Quick Fix Notebook brings together all the step-by-step instructions, precise configuration commands, and real-world guidance you need. This distilled, focused, task-centered guide was written for sysadmins, netadmins, consultants, power users…everyone whose livelihood depends on making Linux work, and keeping it working.

This book’s handy Q&A format gives you instant access to specific answers, without ever forcing you to wade through theory or jargon. Peter Harrison addresses virtually every aspect of Linux administration, from software installation to security, user management to Internet services--even advanced topics such as software RAID and centralized LDAP authentication. Harrison’s proven command-line examples work quickly and efficiently, no matter what Linux distribution you’re using. Here’s just some of what you’ll learn how to do:

Build Linux file/print servers and networks from scratch
Troubleshoot Linux and interpret system error messages
Control every step of the boot process
Create, manage, secure, and track user accounts
Install, configure, and test Linux-based wireless networks
Protect your network with Linux iptables firewalls
Set up Web, email, DNS, DHCP, and FTP servers
And much more…

This guide will introduce you to the world of Software Architecture.

This 162 page guide will cover topics within the field of software architecture including: software architecture as a solution balancing the concerns of different stakeholders, quality assurance, methods to describe and evaluate architectures, the influence of architecture on reuse, and the life cycle of a system and its architecture. This guide concludes with a comparison between the professions of software architect and software engineer.

This 158 Page Guide will cover the basics of Ubuntu 10.10 (such as installation and working with the desktop) as well as guide you through some of the most popular applications.

This guide is simple to follow, with step-by-step instructions and plenty of screen shots, allowing you to discover the potential of your new Ubuntu system even if you are a novice computer user or are migrating from another operating system for the first time. Getting Started with Ubuntu is not intended to be a comprehensive Ubuntu instruction manual. It is more like a quick-start guide that will get you doing the things you need to do with your computer quickly and easily, without getting bogged down with technical details.

Solarflare delivers management flexibility and application acceleration for Redhat Linux KVM with unique Single-Root I/O Virtualization (SR-IOV) support.

Solarflare 10 Gigabit Ethernet Server Adapters enable IT managers to consolidate more guest operating systems over fewer physical servers by providing scalable network I/O bandwidth and removing I/O bottlenecks in virtual server environments. Solarflare has released support for a complete single-root I/O virtualization, or SR-IOV solution, which delivers native network performance on virtualized servers. Furthermore, Solarflare’s unique implementation allows users to leverage hypervisor-based services and management tools, such as virtual machine live migration, while benefitting from dramatically improved I/O performance.

Discover how Solarflare 10GbE technology enables near native performance while preserving hypervisor services, such as live migration by downloading this solution brief.

This tutorial will explain how do I check ProxySG Hardware and Software Uptime through the CLI or GUI

Using GUI

Navigate to https://ProxySG_IP_Address:8082/sysinfo/version

Version: SGOS 5.4.4.1
Release id: 45872
UI Version: 5.4.4.1 (45872)
The current time is Wed Mar 2, 2011 05:05:47 GMT (SystemTime 478587947)
The ProxySG Appliance was last hardware rebooted 44 minutes, and 6 seconds ago. <--- total uptime from the last hardware reboot (Hard reboot/Power Cycle)
The ProxySG Appliance was last software rebooted 44 minutes, and 6 seconds ago. <--- total uptime from the last software reboot (Soft Reboot)
Serial number is 2607063231
NIC 0 MAC is 00D08304DCB5

Using CLI

Login to the ProxySG appliance using a Console/SSH/Telnet connection
Enter Privileged mode using Enable command
SGOS> enable
Enter the following command at the # prompt:
show advanced-url /sysinfo/Version

This will show the current version of the ProxySG appliance and the time since it was last rebooted. As this information is being taken from the Sysinfo file, it might take sometime to populate this information. Here is an example from the CLI running SGOS 6.1.2.1:

ProxySG>enable
Enable Password:
ProxySG#show advanced-url /sysinfo/Version
Blue Coat Systems, Inc., ProxySG Appliance Version Information
Version: SGOS 6.1.2.1
Release id: 54104
UI Version: 6.1.2.1 (54104)
The current time is Tue Mar 8, 2011 23:37:36 GMT (SystemTime 479173056)
The ProxySG Appliance was last hardware rebooted 4 days, 8 hours, 36 minutes, and 32 seconds ago.
The ProxySG Appliance was last software rebooted 4 days, 8 hours, 36 minutes, and 32 seconds ago.
Serial number is XXXXXXXXXX
NIC 0 MAC is 00D08304F884