If wondered if you can shorten the command you use when you ssh to the same machine all the time.
Well, you can pre-configure these settings in a configuration file and have it reference that when you are SSHing into a machine.
That way you can just SSH using this shorter command:
$ ssh master
Instead of the long command:
$ ssh username@ipaddressofmachine -i location/of/ssh/key/file
Here's how you do it.