I just got a dedicated server from hosting company and I want to use a GUI Desktop (Ubuntu Desktop 12.04 + x2go 64-bit system). So I did the following:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install ubuntu-desktop
sudo reboot
I then install VNC: sudo apt-get install tightvncserver and run VNC. But I only see the terminal, not the GUI.