http://www.pixelstech.net/article/index.php?id=1352219881

http://sysadmincasts.com/episodes/13-crash-course-on-common-commands

[ Command Line Crash Course ]
http://learnpythonthehardway.org/book/appendixa.html

http://viget.com/extend/level-up-your-shell-game

http://matt.might.net/articles/settling-into-unix/ http://matt.might.net/articles/basic-unix/

[ A little collection of cool unix terminal/console/curses tools ]
http://kkovacs.eu/cool-but-obscure-unix-tools/