yum install xorg-x11-server-Xvfb
COOKIE=`ps -ef | md5sum | cut -f 1 -d " "`
xauth -f ~/Xvfb-0.auth add :0 MIT-MAGIC-COOKIE-1 $COOKIE
xauth add :0 MIT-MAGIC-COOKIE-1 $COOKIE
Xvfb :0 -auth ~/Xvfb-0.auth -screen 0 1024x768x24 &
DISPLAY=:0 nohup /etc/gdm/Xsession gnome-session &
sudo /etc/NX/nxserver --restart