Consult shutdown manpage | To main screen

Alter system state

Would you like to stop or reboot the system:

Reboot system
Halt the system
Kick everybody off (leave system in multi-user state, but only super-users may login)

Should this occur immediately, after x minutes or on a special date:

Now
After minutes
At : on - -
type HH:MM and DD - MM - YYYY

Warning message to broadcast to users currently logged in:

 

Note that all subsequent logins to this machine will fail if you confirm this screen.