Unused GUI (X window) in ReadHat

Sometimes, I want to use RedHat at text mode. To exchange from X Window(X11) to text mode, you can open \etc\inittab by command
vi /etc/inittab
and repair line id:5:initdefault: by id:3:initdefault: .

Certainly, you can exchange reserve, by use text mode via vi .
Simple, repair 3 to 5!