SHUTDOWN(1B) BSD Compatibility Package Commands SHUTDOWN(1B)

NAME

shutdown - close down the system at a given time

SYNOPSIS

/usr/ucb/shutdown [-fhknr] time [warning-message]...

DESCRIPTION

shutdown provides an automated procedure to notify users when the
system is to be shut down. time specifies when shutdown will bring
the system down; it may be the word now (indicating an immediate
shutdown), or it may specify a future time in one of two formats:
+number and hour:min. The first form brings the system down in number
minutes, and the second brings the system down at the time of day
indicated in 24-hour notation.


At intervals that get closer as the apocalypse approaches, warning
messages are displayed at terminals of all logged-in users, and of
users who have remote mounts on that machine.


At shutdown time a message is written to the system log daemon,
syslogd(8), containing the time of shutdown, the instigator of the
shutdown, and the reason. Then a terminate signal is sent to init,
which brings the system down to single-user mode.

OPTIONS

As an alternative to the above procedure, these options can be
specified:

-f
Arrange, in the manner of fastboot(1B), that when the system is
rebooted, the file systems will not be checked.


-h
Execute halt(8).


-k
Simulate shutdown of the system. Do not actually shut down the
system.


-n
Prevent the normal sync(2) before stopping.


-r
Execute reboot(8).

FILES

/etc/rmtab
remote mounted file system table

SEE ALSO

login(1), fastboot(1B), sync(2), rmtab(5), attributes(7), halt(8),
reboot(8), syslogd(8)

NOTES

Only allows you to bring the system down between now and 23:59 if you
use the absolute time for shutdown.

October 11, 1994 SHUTDOWN(1B)