x86: How to Stop and Reboot a System for Recovery Purposes
Before You Begin
Ensure that your role has the appropriate rights profiles to perform this procedure. See Using Rights Profiles to Administer Boot Features.
If the keyboard and mouse are functional, type init 0 to stop the system.
$ init 0
If the system does not respond to any input from the mouse, do one of the following:
Press the Reset key to reboot the system.
Use the power switch to reboot the system.