What is SSH and how do I use it with my site?
Generally a user will not need SSH in order to operate their account. It is a secure means of logging into the shell on the server and issuing various command line instructions. It is not intended for those who don't know what they are doing as you can do some major damage to your site if you make mistakes. Potentially unrecoverable mistakes. If you want more info go to:
http://www.rz.uni-karlsruhe.de/~ig25/ssh-faq/