REBOOT(8) BSD System Manager's Manual REBOOT(8)
NAME
reboot, halt - stopping and restarting the system
SYNOPSIS
halt [-dnpq]
reboot [-dnq]
DESCRIPTION
The halt and reboot utilities flush the filesystem cache to disk, run the
system shutdown script, send all running processes a SIGHUP, SIGTERM and
one or more SIGKILL, and, respectively, halt or restart the system. The
action is logged, including entering a shutdown record into the login ac-
counting file.
The options are as follows:
-d Causes system to create a dump before rebooting. This option is
useful for debugging system dump procedures or capturing the
state of a corrupted or misbehaving system. See savecore(8) for
information on how to recover this dump.
-n Prevent filesystem cache from being flushed. This option should
probably not be used.
-p Causes the system to power down, if it is being halted, and the
hardware supports automatic power down.
-q Quick. The system is halted or restarted quickly and ungraceful-
ly, and only the flushing of the filesystem cache is performed.
This option should probably not be used.
Normally, the shutdown(8) utility is used when the system needs to be
halted or restarted, giving users advance warning of their impending
doom.
FILES
/etc/rc.shutdown script which is run at shutdown time by /etc/rc
/var/db/host.random where 2 KiB entropy are stored before reboot(2)
SEE ALSO
reboot(2), utmp(5), boot_i386(8), boot_sparc(8), rc.shutdown(8),
savecore(8), shutdown(8), sync(8)
HISTORY
A reboot command appeared in Version 6 AT&T UNIX.
MirBSD #10-current August 7, 2017 1