If you're interested in learning more about the operating system we use here:

Google has a linux-specific search engine.
Here is an old Linux User's Guide which may have some handy information in it.
Here is a handy list of all bash commands. (Commands you can type into that little window that expects you to actually type stuff; aka the terminal or in KDE, the Konsole.)

Some pointers
-passwords- To change your password, you should use the yppasswd command, not passwd; since the latter will only change it on the machine you're currently logged into. You want to change it on the entire network.

-man pages- Linux comes with extensive documentation, if you know how to use it. In particular, most common bash commands come with manual pages, which can be accessed by running

 % man cmd

(replacing cmd with the name of the command). If you're not sure of the application, you can try typing

 % apropos string

which will return a list of all man pages containing information relevent to "string". Dr. Pixton has a web version on his webpage.

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