Append the command with an ampersand (&) and it will run in the background. IE: If I wanted to launch Mozilla from a terminal, I'd type
to background it. Type
to bring it back into the foreground, and
for more information. To background a task already running (IE: You forgot the ampersand the first time), press <Ctrl>+Z to suspend it, then
to send it to the background. Also see
as this will provide more information on job control.