Silly SSH Question
 

Ok this is a totally n00b question,

but if I'm logged into a CLI on 1 linux machine and then I type ssh testmachine I connect to that machine and can run stuff great! But how do I then go back to my local prompt....i.e. close the SSH session?

just "exit" the shell

Forgive me, but if I've got the terminal open, and I ssh to another machine, then close the terminal to exit the ssh, I would then have to open another terminal to get back to my CLI.... Can I do all of that in just 1 terminal?

type exit at the prompt of remote machine and press the Enter/return key. you will be back to your machine's prompt

If you want to work in the local shell, but continue the ssh session later, you can enter the escape character followed by [CTRL-z].

You can also change the escape character with the -e option. See "man ssh" for more details.