In order to install cPanel/WHM on your CentOS dedicated server or a VPS, run the following commands via SSH (Secure Socket Shell):
wget -N http://httpupdate.cpanel.net/latest
After this cPanel should become available on your VPS or Dedicated Server IP address, on port 2086.
To access WHM > http://replace_with_your_server_ip_address/whm
To access cPanel > http://replace_with_your_server_ip_address/cpanel
open in any modern web browsers such as Chrome, FireFox, Safari, Opera etc.