http://www.unixguide.net/linux/linuxshortcuts.shtml
http://www.slackersbible.org/
http://www.cyberciti.biz/
http://www.linuxquestions.org/
http://slackbuilds.org/
http://shilo.is-a-geek.com/
http://linux.byexamples.com/
http://rlworkman.net/pkgs/
http://rlworkman.net/links/
http://slackwiki.org/Main_Page