Here's a quick tutorial on how to install VNC (client and server) on Ubuntu.
First of all, let's install
sudo aptitude install vnc4server
After this is installed, run it. This will show something like:
You will require a password to access your desktops. Password: Verify: Password too long - only the first 8 characters will be used xauth: creating new authority file /home/server/.Xauthority New 'server:1 (root)' desktop is server:1 Creating default startup script /home/server/.vnc/xstartup Starting applications specified in /home/server/.vnc/xstartup Log file is /home/media/.vnc/media:1.log
Once this is completed, you have to allow access using the remote desktop tool.
Install the client using this command:
sudo aptitude install xvnc4viewer
Then simply run it:
xvnc4viewer LowColourLevel=1 server.host