Install a VNC Server in Ubuntu

Step1: Install vnc4server and xinetd
sudo apt-get install vnc4server xinetd

Step2: Edit ~/.vnc/xstartup
Uncomment the lines that start with unset and exec. Comment out the lines that start with xsetroot, vncconfig, xterm, and twm.
The final file should look like:
#!/bin/sh
# Uncomment the following two lines for normal desktop:
unset SESSION_MANAGER
exec /etc/X11/xinit/xinitrc
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
#xsetroot -solid grey
#vncconfig -iconic &
#xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
#twm &


Step3: Stop vncserver
vnc4server -kill :1

Step4: start vncserver
vnc4server