HALT(8) System Manager's Manual HALT(8)
halt - stop the processor
/etc/halt [ -n ] [ -q ] [ -y ]
Halt writes out sandbagged information to the disks and then stops the
processor. The machine does not reboot, even if the auto-reboot switch
is set on the console.
The -n option prevents the sync before stopping. The -q option causes
a quick halt, no graceful shutdown is attempted. The -y option is
needed if you are trying to halt the system from a dialup.
It is very difficult to halt a VAX, as the machine wants to then reboot
itself. A rather tight loop suffices.
4th Berkeley Distribution 11 May 1981 HALT(8)