On 07/02/2012 11:00 AM, Bill Davidsen wrote: > I have several systems which either reboot or drop to some zombie mode > on shutdown from the WM (GNOME3, XFCE, Cinnamon) and on all of them > "shutdowen -h" doesn't power off (as the man page says is optional) > while "shutdown -P" does. That's not too unreasonable. I'd take -h to mean halt, and -P as Power Off.