Installing VNC in CentOS 5/6

When you are installing make sure the Desktop Environment is already installed.

Installing VNC Server in CentOS 6
yum install tigervnc-server
vncpasswd #to configure vnc to user

To Start vncserver
vncserver:2
To Stop
vncserver –kill :2
vim /home/root/.vnc/xstartup
#twm &
exec gnome-session &

Display setting
vncserver :2 –geometry 800x600 –depth 24

Installing VNC Server in CentOS 5.x
yum install vnc-server
vim /etc/sysconfig/vncserver
#locate and make change as follows. Where 2 is Display Number and root is the user
VNCSERVERS="2:root"
#uncomment and remove –localhost
VNCSERVERARGS[1]="-geometry 1024x768 –nolisten tcp –nohttpd"

Now let's assign VNC password to the user root. As I am already logged in as root I will not be switching user.
vncpasswd

service vncserver start
vim /home/root/.vnc/xstartup
#comment twm &
#twm &
#Add to run in gnome
exec gnome-session &

service vncserver restart
chkconfig vncserver on