CommandLine utility for connecting to remote computers via the SecureShell protocol.

It assumes that your username on the remote computer is the same as the one that you are on. To specify a different username, use the -l switch:

ssh -l username web.site.address.com 

As usual, "man ssh" will provide you with more complete documentation.

Rather than using -l, you can also type:

ssh username@web.site.address.com 

It's more intuitive (for me, anyway).

In addition to ssh, Mac OS X provides scp, a tool to transfer files using the ssh protocol:

scp localfile.txt username@web.site.address.com: 

With just the : at the end of the target, the file will be placed in "username"'s home directory. If you want the file in a specific place, you need to specify it:

scp localfile.txt username@web.site.address.com:/tmp 

Finally, scp works in the opposite direction:

scp username@web.site.address.com:/tmp/remotefile.txt . 

As always, "man scp" will prove enlightening.