Off Topic Warning: cPanel control panel questions are generally considered off topic for ServerFault.
cPanel is a Linux based web hosting control panel that provides a graphical interface and automation tools designed to simplify the process of hosting a web site. It provides capabilities for administrators, resellers, and end-user website owners to control the various aspects of website and server administration through a standard web browser. http://cPanel.com
Off Topic Warning:
The majority of questions regarding the cPanel control panel are likely to be closed as they are not considered on-topic for ServerFault:
Questions involving web hosting control panels are off-topic at Server Fault because they customize their systems such that normal administration tools and methods no longer apply, and thus require support from the vendor or the web hosting industry. See Where can I ask questions about web hosting control panels?