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Operating Systems
Solaris
difference between init and shutdown
Post 302335951 by upengan78 on Monday 20th of July 2009 09:11:14 PM
07-20-2009
What it means is that, if you give shutdown command in a solaris shell, then anyone connected to system shell will see a message on their screen that system is going down in 1 minute...then again after 30 seconds...
You can ssh to your test system and watch the screen. At the same time give shutdown command at console. See it yourself.
You can ssh to your test system and watch the screen. At the same time give shutdown command at console. See it yourself.
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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)