unix

Learn the Linux command line. Classic, comprehensive tutorial on shell scripting and Unix command-line tools.

Convert Unix timestamps to human-readable dates and back.

Repository of command-line snippets. User-submitted one-liners for common and obscure tasks.

Gary Bernhardt's screencasts on software. Advanced topics explained well.

Linux and Unix tutorials and tips. Practical sysadmin knowledge.

A loose association of pubnix servers providing free Unix shell accounts and fostering a community of small-web enthusiasts.