How do I change the default run level in Linux?

[petulia3478]

Edit /etc/inittab and change id:5:initdefault: as appropriate.

For example, in the example below, the default run level is 5:
id:5:initdefault:

To change it to 3:

# vi /etc/inittab
id:3:initdefault:

This change will only take effect after a reboot.