If we want access to remote system then we use ssh. But what in case if we need to run some program in graphical mode?

If we run ssh with parameters ‘C’ and ‘X’
-X is standing for X11 forwarding, and
-C is standing for compression of all data.

So, if we run ssh as:

(Notice that $ is not part of command).

and then run program which we want, for example thunderbird with

After this thunderbird process will be run at remote computer and window will be shown at the host computer.