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Top Forums UNIX for Advanced & Expert Users How to stop a reboot after init 6 is given by mistake? Post 302901354 by gandolf989 on Tuesday 13th of May 2014 01:10:05 PM
Old 05-13-2014
Quote:
Originally Posted by Corona688
This would not work, because 'init 6' does nothing but send a signal of some sort to the real init process, the one which started when the computer booted. You'd have a fraction of a millisecond to catch 'init 6' before it sends that signal and quits.

Killing the real init process would make things worse.
That is good to know in case I do type init 6 as root on a unix system. The other problem with someone accidentally doing init 6, is that even if you can stop the shutdown from happening, the OS will start killing processes. Processes that would need to be restarted. Either way doing init 6 or shutdown on a running production server by accident is going to cause issues.
 

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started(7)						 Miscellaneous Information Manual						started(7)

NAME
started - event signalling that a job is running SYNOPSIS
started JOB=JOB INSTANCE=INSTANCE [ENV]... DESCRIPTION
The started event is generated by the Upstart init(8) daemon when an instance of a job has finished starting and is now running. The JOB environment variable contains the job name, and the INSTANCE environment variable contains the instance name which will be empty for sin- gle-instance jobs. init(8) emits this event as an informational signal, services and tasks started or stopped by this event will do so in parallel with other activity. It is typically combined with the stopping(7) event by services declaring a dependency. Job configuration files may use the export stanza to export environment variables from their own environment into the started event. See init(5) for more details. EXAMPLE
A service that wishes to depend on another service might use: start on started apache stop on stopping apache A task that must be run after another task or service has been started might use: start on started postgresql SEE ALSO
starting(7) stopping(7) stopped(7) init(5) Upstart 2009-07-09 started(7)
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