NAME

shutdown − close down the system at a given time

SYNOPSIS

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

AVAILABILITY

SUNWscpu

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(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. 

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(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 ALSO

fastboot(1B), login(1), halt(1M), reboot(1M), syslogd(1M), sync(2), rmtab(4)

NOTES

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

SunOS 5.5  —  Last change: 11 Oct 1994