Found this link on digg.com. If you knew those DOS commands back in the day you will have no problem learning linux. Here is the excerpt from the article. “So you know DOS. You’re used to it, and it makes you feel warm and fuzzy. Snap out of it. This page is a list of Linux commands and they’re DOS cousins, so you can feel more comfortable navigating in the Linux world, though you might have already known some of these commands if you’ve ever used an FTP client.”