shutdown(1B) manual page
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shutdown - close down the system at a given time
/usr/ucb/shutdown
[ -fhknr ] time [ warning-message ... ]
SUNWscpu
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(1M)
, 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.
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(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)
.
- /etc/rmtab
- remote mounted file system table
fastboot(1B)
, login(1)
, halt(1M)
, reboot(1M)
, syslogd(1M)
, sync(2)
,
rmtab(4)
Only allows you to bring the system down between now and
23:59 if you use the absolute time for shutdown.
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