SHUTDOWN(1B)SHUTDOWN(1B)NAMEshutdown - close down the system at a given time
SYNOPSIS
/usr/ucb/shutdown [-fhknr] time [warning-message]...
DESCRIPTIONshutdown provides an automated procedure to notify users when the sys‐
tem 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 mes‐
sages 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, sys‐
logd(1M), containing the time of shutdown, the instigator of the shut‐
down, 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 speci‐
fied:
-f
Arrange, in the manner of fastboot(1B), that when the system is
rebooted, the file systems will not be checked.
-h
Execute halt(1M).
-k
Simulate shutdown of the system. Do not actually shut down the
system.
-n
Prevent the normal sync(2) before stopping.
-r
Execute reboot(1M).
FILES
/etc/rmtab
remote mounted file system table
SEE ALSOfastboot(1B), login(1), halt(1M), reboot(1M), syslogd(1M), sync(2),
rmtab(4), attributes(5)NOTES
Only allows you to bring the system down between now and 23:59 if you
use the absolute time for shutdown.
Oct 11, 1994 SHUTDOWN(1B)
