Local Documentation
LinuxSurvivalGuide A brief introduction to Linux
UbuntuAndDebianResources some essential links to help maintain your system
CommandPrompt don't be afraid of the command prompt, use it.
RutgersUbuntuMirror How to use the Ubuntu Mirror at Rutgers
Offsite Documentation
Command Prompt related
Linux Command - A tutorial and reference for the command line, including script writing. Also contains a great page of links.
http://kianga.kcore.de/latest/linuxfaq - A small Linux faq, good for the impatient
Ubuntu related
Debian related
APT package management
The APT HOWTO apt is a package manager used by both Debian and Ubuntu