Installing desktop on CentOS minimal

For installing Desktop Packages:

GNOME:
# yum -y groupinstall "Desktop" "Desktop Platform" "X Window System" "Fonts" 

KDE:

# yum -y groupinstall kde-desktop

Starting GNOME

After minimal install, the system was running on CLI mode, so for GUI mode, the initialization process need to be changed.

Step 1: go to inittab
             # vi /etc/inittab

Step2: You will find following line:
                   id:3:initdefault:
             this should be changed to:
                   id:5:initdefault:

Finally,
Perform a reboot # init 6


References:

1. http://www.idevelopment.info/data/Unix/Linux/LINUX_AddGNOMEToCentOSMinimalInstall.shtml
2. http://blog.nowherelan.com/2013/12/24/install-a-desktop-environment-on-centos-minimal-install/