reboot, halt - stopping and restarting the system
The halt and reboot utilities flush the file system cache to
the system shutdown script, send all running processes a
subsequently a SIGKILL), and, respectively, halt or restart
The action is logged, including entering a shutdown record
into the login
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
information on how to recover this dump.
-n Prevent file system cache from being flushed. This
probably not be used.
-q Quick. The system is halted or restarted quickly
and only the flushing of the file system cache
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. (Currently
some i386, luna88k, mac68k, macppc, sparc and
Normally, the shutdown(8) utility is used when the system
needs to be
halted or restarted, giving users advance warning of their
/etc/rc.shutdown script which is run at shutdown time
reboot(2), utmp(5), boot_alpha(8), boot_amd64(8),
boot_hppa(8), boot_i386(8), boot_mac68k(8), boot_macppc(8),
boot_mvme68k(8), boot_mvme88k(8), boot_sparc(8),
boot_vax(8), rc.shutdown(8), savecore(8), shutdown(8),
A reboot command appeared in Version 6 AT&T UNIX.
OpenBSD 3.6 June 9, 1993
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