Using SSH is simple, and very similar to the way the Berkeley r-commands work.

To connect to another host, type:

ssh <hostname>

To connect to a remote host and run a command, type:

ssh <hostname> <command>

To run an X client remotely, the -f option usually works out best:

ssh -f <hostname> <command>

That will establish a connection and, once authentication is complete, will put the ssh connection in the background while the X client starts up.

To copy a file between hosts using ssh, type:

scp <host>:<filea> <fileb>

This would copy file filea, located on host host into the local file fileb.