cPanel/WHM is installed with 2 simple commands with a fresh install of CentOS
wget http://httpupdate.cpanel.net/latest
sh latest
Once installed you visit the following link. Change xxx.xxx.xxx.xxx to your server ip address
https://xxx.xxx.xxx.xxx:2087/
username root
If you are unable to access cPanel / WHM, iptables is probably stopping it. You can disable iptables with the following command
service iptables stop
After cPanel installs you can remove the install script with the following command
rm -f latest
cPanel is a Unix based web hosting control panel that provides a graphical interface and automation tools designed to simplify the process of hosting a web site. cPanel utilizes a 3 tier structure that 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.
In addition to the GUI, cPanel also has command line and API-based access that allows third party software vendors, web hosting organizations, and developers to automate standard system administration processes.
cPanel is designed to function either as a dedicated server or virtual private server. The latest cPanel version supports installation on CentOS, Red Hat Enterprise Linux (RHEL), and CloudLinux cPanel 11.30 is the last major version to support FreeBSD.
Application-based support includes Apache, PHP, MySQL, PostgreSQL, Perl, and BIND (DNS). Email based support includes POP3, IMAP, SMTP services. cPanel is accessed via https on port 2083.
Once installed, cPanel cannot be removed (without extreme difficulty). The server must be formatted, and the operating system reinstalled. Similarly, it should only be installed on a freshly installed operating system with minimal prior configuration.