Linux: Cheat sheets

I'm trying to brush up on my linux skills and commands, and i constantly searching the web for commands and such. I was thinking about creating a type of "cheat sheet" or commands that i use most often. But until i do, here is a really, really comprehensive listing of different commands that I've found posted on Scott Klarr's website;

http://www.scottklarr.com/topic/115/linux-unix-cheat-sheets---the-ultimate-collection/