VirtualMin is free system help user can easy manager their server or VPS. I usually use it with Drupal hosting, here is note for install VirtualMin on CentOS
Update System
# sudo yum -y update
Install pre-requisites
# sudo yum -y install perl
Download VirtualMin Installer
# wget http://software.virtualmin.com/gpl/scripts/install.sh
Installation
# sudo sh install.sh
Wait a moment, it about to 5 minutes to install VirtualMin on your system.