SSH is actually referred to as Remote Login in OS X. it can be enabled on a single machine by going to System Preferences -> Sharing.

but what if you decide that you want to enable it on a few hundred computers, this could take a long time. so I found these commands that can be sent through Apple Remote Desktop which will enable it.

To enable or disable remote login (or SSH):

$ sudo systemsetup -setremotelogin (on|off)