To install Installatron on a cPanel server make sure that you have cPanel/WHM 11.x (latest), 10.x, 9.x versions available.
Now login to the server as root.
Get the Installatron Script.
Assign appropriate ownership to the installatron_setup.sh
chmod 755 installatron_setup.sh
Run the script.
Installation is now ready to use in cPanel and WHM.