REBOOT(8) BSD System Manager's Manual REBOOT(8)NAME
reboot, halt - stopping and restarting the system
SYNOPSIS
halt [-dhnq]
reboot [-dnq]
fasthalt
fastboot
DESCRIPTION
The halt and reboot utilities flush the filesystem cache to disk, send
all running processes a SIGTERM (and subsequently a SIGKILL) and, respec-
tively, halt or restart the system.
The options are as follows:
-d The -d option causes the system to make a ``crash dump'' (debug-
ging image) when halting or rebooting.
-h Once the system has halted, attempt to power down the machine.
If the hardware does not support this feature this option is
silently ignored.
-n If the -n option is specified, the filesystem cache is not
flushed. This option should probably not be used.
-q If the -q option is specified, the system is halted or restarted
quickly and ungracefully, and only the flushing of the filesystem
cache is performed. This option should probably not be used.
The reboot or halt action is logged, including entering a shutdown record
into the login accounting file; see syslogd(8) and wtmp(5) for more in-
formation.
Normally, the shutdown(8) utility is used when the system needs to be
halted or restarted, giving users advance warning of their impending
doom.
SEE ALSOwtmp(5), boot(8), shutdown(8), sync(8)COMPATIBILITY
Historically, the fastboot and fasthalt commands were shell scripts that
arranged for the filesystems not to be checked on reboot. As filesystems
are no longer checked unless necessary, they have been deleted and are
now simply links to the reboot and halt commands.
HISTORY
A reboot command appeared in Version 6 AT&T UNIX.
BSDI BSD/OS June 9, 1993 1
