Before install WHM and cPanel, check and see if they are installed or not using:
# ls /scripts/upcp
If they are installed, connect to server using:
https://xxx.xxx.xxx.xxx:2087 or http://xxx.xxx.xxx.xxx:2086
If they are not installed, type the following to begin the installation process:
# mkdir /home/cpins
# cd /home/cpins
# wget http://layer1.cpanel.net/latest
# sh latest
Wait for 10-79 minutes to finish the install.