I installed Ubuntu Server with Desktop support that I almost never use. Also using GUI is both resource damanding and can be a security issue. This is why I decided to completely remove it from my server.
This is how to do it.
sudo apt-get -y purge ubuntu-desktop sudo apt-get -y purge unity gnome-shell lightdm sudo apt-get -y remove ubuntu-desktop sudo apt purge ubuntu-desktop -y && sudo apt autoremove -y && sudo apt autoclean sudo apt-get -y clean sudo apt-get -y autoremove sudo apt-get -f install
However if you need to install it again just run the following command:
sudo apt-get install ubuntu-desktop