Installing the great script installer softaculous is very simple and easy, follow the bellow by running the commands in SSH to install softaculous upon a   cPanel server.

Step one: cd /usr/local/cpanel/whostmgr/docroot/cgi

Step two: wget -N http://www.softaculous.com/ins/addon_softaculous.php

Step three: chmod 755 addon_softaculous.php

Now go to : WHM > Plugins > Softaculous - Instant Installs and there you go!