Warning

If you use a SSH server over internet, or any other unsecured network, you have to use STRONG passwords.
Just to be in peace with myself: If you use a SSH server over internet, or any other unsecured network, you have to use STRONG passwords.
For your password, be careful of symbols, because if you plan to connect from another country, you may not have them on the keyboard.
Also take a look at /etc/ssh/sshd_config , and be sure that the newer protocol is used, and also straight root login is disabled.

Activate the SSH server

chmod +x /etc/rc.d/rc.sshd
/etc/rc.d/rc.sshd start

Keys will be generated. SSH server is now activated at each boot.

You can easily copy files in a very secure way, but i won't cover it here (for now).

You can easily mount remote folders in a very secure way, but i won't cover it here (for now).

You can easily forward remote applications (like VNC) in a very secure way, but i won't cover it here (for now).