Designed for the new command line user, this 522 page volume covers the same material as LinuxCommand.org but in much greater detail.

An in-depth exploration of the art of shell scripting

Quick guide to learn how to apply and create patches.

“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.”

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