How to Switch off a Unix machine abruptly Post: 302679017

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LEARN ABOUT SUNOS

shutdown

shutdown(1B)					     SunOS/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(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 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

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       fastboot(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.

SunOS 5.10							    11 Oct 1994 						      shutdown(1B)