SSH allows you to use a shell on another computer (as telnet does), and you can copy files (with scp). If you want to run an SSH server, you have to change the root password. Just type "passwd" and give a valid password. Then, run the server: "/etc/init.d/sshd start". You can stop it with "/etc/init.d/sshd stop" Of course, this computer can be an SSH client: just use "ssh login@ssh.server.org" or "scp source dest". Both source and dest may be local or remote. Use "login@ssh.server.org:/path/filename" for remote files.