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Full Discussion: Where to put script to be executed before shutdown ?
Operating Systems Linux Red Hat Where to put script to be executed before shutdown ? Post 302998269 by Aia on Sunday 28th of May 2017 09:11:39 PM
Old 05-28-2017
Write a service file and place it in /etc/systemd/system/beforeshuttingdown.service
Code:
[Unit]
Description=Before Shutting Down

[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/bin/true
ExecStop=<path to script or program>

[Install]
WantedBy=multi-user.target

Your program or script must be executable.
Code:
systemctl daemon-reload
systemctl enable beforeshuttingdown.service
systemctl start beforeshuttingdown.service

Last edited by Aia; 05-28-2017 at 10:41 PM..
This User Gave Thanks to Aia For This Post:
Sivashni
 

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LEARN ABOUT LINUX

reboot

reboot(8)						      System Manager's Manual							 reboot(8)

NAME

       reboot, halt, poweroff - reboot or stop the system

SYNOPSIS

       reboot [OPTION]...

       halt [OPTION]...

       poweroff [OPTION]...

DESCRIPTION

       These programs allow a system administrator to reboot, halt or poweroff the system.

       When  called  with  --force or when in runlevel 0 or 6, this tool invokes the reboot(2) system call itself and directly reboots the system.
       Otherwise this simply invokes the shutdown(8) tool with the appropriate arguments.

       Before invoking reboot(2), a shutdown time record is first written to /var/log/wtmp

OPTIONS

       -f, --force
	      Does not invoke shutdown(8) and instead performs the actual action you would expect from the name.

       -p, --poweroff
	      Instructs the halt command to instead behave as poweroff.

       -w, --wtmp-only
	      Does not call shutdown(8) or the reboot(2) system call and instead only writes the shutdown record to /var/log/wtmp

       --verbose
	      Outputs slightly more verbose messages when rebooting, useful for debugging problems with shutdown.

ENVIRONMENT

       RUNLEVEL
	      reboot will read the current runlevel from this environment variable if set in preference to reading from /var/run/utmp

FILES

       /var/run/utmp
	      Where the current runlevel will be read from; this file will also be updated with the runlevel record being replaced by  a  shutdown
	      time record.

       /var/log/wtmp
	      A new runlevel record for the shutdown time will be appended to this file.

AUTHOR

       Written by Scott James Remnant <scott@netsplit.com>

REPORTING BUGS

       Report bugs at <https://launchpad.net/upstart/+bugs>

COPYRIGHT

       Copyright (C) 2009 Canonical Ltd.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       shutdown(8) telinit(8) runlevel(8)

Upstart 							    2009-07-09								 reboot(8)
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