Ten OS X Command Line Utilities you might not know about OS X Daily - Your Daily Source for Mac OS X Tips, Tricks, Cool Software, System Updates, and More!

Tips and tricks for Mac OS X. Contains tutorials for new users, quick tips, timesaving tricks and hidden features. Tips for iLife, Finder, Mail, Safari and much more. Many simple hints for new users, but even the lifetime Mac user will find something (...)

Here you can learn how to use the Linux command line.

13 command line tricks for use by web developers and other *nix enthusiasts

Examine key parts of the Z shell (zsh) and how to use it's features to ease your UNIX(R) system administration tasks. zsh is a popular alternative to the original Bourne and Korn shells. It provides an impressive range of additional functionality, in (...)

Computer Help from your Friendly How-To Geek