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Top Forums UNIX for Advanced & Expert Users emergency shutdown best practices. Post 302244741 by avronius on Wednesday 8th of October 2008 02:00:19 PM
Old 10-08-2008
If you can ssh around as root
Code:
for host in `cat hostlist`; do ssh $host shutdown <arguments>;done

(assuming that you put all of the hosts in a file named hostlist)
 

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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 5.11 11 Oct 1994 shutdown(1B)
All times are GMT -4. The time now is 06:05 PM.
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