What is CPanel and WHM :

cPanel is a convenient application that allows users to administer servers through a GUI interface instead of the traditional command line. Although the installation for cPanel is relatively simple, the script does take several hours to run.

Cpanel is web-based control panel makes site management a piece of cake. Empower your customers and offer them the ability to administer every facet of their website using simple, point-and-click software.

Notes :

• Once cPanel and WHM is installed on VPS or Dedicated Server, it cannot be removed from the server without a complete server restore. cPanel does not offer an uninstaller
• Additionally, cPanel is subject to a licensing fee which may come out to be around $15 for VPS and 40$ for Dedicated Server per month .
• Pakistan Web Server offer Cpanel licence and also full support for installation and configuration services more detail can find out here

Installation Cpanel on Centos 6 or 7 :

Before installing Cpanel on your server kindly make sure the Perl installed on your server for that open Putty and login to your root server via SSH

sudo yum install perl

Although the cPanel installation only has several steps, the installation does take a long time. Although using program “screen” is not necessary in order to install cPanel, it can be a very helpful addition to the installation process. It can be especially useful if you know that you may have issues with intermittent internet or that you will need to pause the lengthy install process.
To install cPanel & WHM on your server, run the following command:

cd /home && curl -o latest -L https://securedownloads.cpanel.net/latest && sh latest

Once cPanel finally installs, you can access the login by going to your ip address as like given below to your WHM to configuration your hosting and Apache :
yourip:2087 or may yourip:2086