“Many users have implemented Secure Shell (ssh) to provide protected access to a remote Linux system, but don’t realize that by allowing password authentication, they are still open to brute-force attacks from anywhere on the Internet.”

YAVCS (Yet Another Vim Cheat Sheet)

Great cheat sheet for beginners

a few of the amazing features bash provides that will increase your productivity in the shell

If you’re bewildered by the unix shell, take 20 minutes and walk through this swell tutorial.