CPanel
This page has a variety of information on cPanel servers.
General Information
Common Ports - Common ports that are used on cPanel Servers
cPanel Scripts - Listing and brief explanations for common cPanel Scripts
LAMP Stack
Software Versions - What versions of Linux, Apache, php, mySQL, etc are installed?
DNS - DNS in WHM and cPanel
exim exim is the SMTP mailserver
Logs
Log Locations - Where are log files?