Welcome to the Psygen wiki.
cPanel - Information on cPanel and WHM. Core LAMP stack and mail server info is under here as well.
Log Locations - Locations for Common Logs
Linux Commands - a small reference list of Linux Commands that I use often, with short examples.
Other Software - Reference guides to stuff like Spam Assassin, etc
Plesk - Information on Plesk. LAMP stack and mail server stuff as well (is different than on a cPanel box.)
Procedures - Other procedures that may span two or more software programs. (Spam fighting, for example)
Regular Expressions - A quick reference for regular expressions.