SSH X11 Forwarding
In order to enable this, you must login with
ssh -X <username>@<host>
SSH supports tunneling of X11 (X-Windows). This is also very useful if you want to open graphical displays from the remote machine on your local computer. To achieve this, an X11 server must be running on your local machine. The X11 connections are then tunneled and automatically encrypted by your SSH client.
For some types of graphical software this does not work correctly (if they need input from keystrokes). In those cases you must use