HEATKEYS

Provides Instruction Guides, How-Tos, Troubleshooting Tips and Tricks on Linux, Database, Hardware, Security, Web and Open Source for both Newbies and Geeks - TheGeekStuff by Ramesh Natarajan

Free computer help and support. Answering all your computer related questions with complete information on all hardware and software.

Linux Career Docs include a range of technical Linux articles from such categories as Linux administration, software installation, Linux package management, Linux development, Linux commands and more.

LiveFire Labs provides quality, affordable, and globally accessible online UNIX training to students who are serious about learning the UNIX operating system and related technologies. Students learn UNIX by performing hands-on exercises on real serv...

This site is your Internet destination for information and resources for the Linux operating system and various Linux distributions.

Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.

Linux Classes and Training. Free Linux Lessons.

Tutorials for Java, Linux, Mac OS X, iPhone, iPad, Android, Drupal, MySQL, UML, software quality, testing, and more.

LinuxQuestions.org offers a free Linux forum where Linux newbies can ask questions and Linux experts can offer advice. Topics include security, installation, networking and much more.

Instructions/Tutorials on Unix/Linux commands, C Programming, Unix Administration , Oracle, PL SQL, Perl, Productivity tips soft skills for newbies and professionals.

A Command line reference for Windows, Powershell, vbscript, bash, OSX, Oracle and SQL Server