simple newbie question
 

If I knew what to call this, I'd search for it. I remember from years ago that when running a program from the command line in *nix, you could specify some argument that would run the program and then give the prompt back to you. For example, typing

> emacs


normally runs emacs but then doesn't take you to another prompt in that terminal. How do you get that prompt? I assume it's the same among the flavors of Linux, but I'll be using Red Hat.

Sorry for such a boring question!

Thanks...