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Shutdown
In systemd the shutdown command does not work anymore. It has been made more complicated. See Systemd halt service. Use
systemd-poweroff.service
Log files
In these logfiles maybe you can find a clue about the shutdown reason
/var/log/boot /var/log/debug /var/log/kern.log /var/log/messages /var/log/syslog /var/log/user.log
Show shutdown time
The shutdown time and reason, if there was no crash or freeze, can be found in
- /var/log/auth.log (search for “System is powering down”)
- /var/log/syslog (search for “Stopping Light Display Manager”)
reasons might also be other reasons
A list of shutdown times can be generated with
last -x shutdown
An example entry
shutdown system down 4.19.0-9-amd64 Thu Jul 30 16:22 - 20:11 (03:49)
This means the system was in shutdown state (off) from Jul 30 16:22 until Jul 30 20:11 which is during 03:49 hours
Show up time
A list of system running times can be generated with
last -x reboot
An example entry
reboot system boot 4.19.0-9-amd64 Tue Jun 19 19:24 - 13:47 (18+18:23)
This means the system was booted on and up (running) from Jun 19 19:24 until Jul 8 13:47 which is during 18 days and 18:23 hours
Log shutdown
Create a file named $HOME/shutdownlogging.service containing
[Unit] Description=Create a log entry in $HOME/shutdown.log when the computer is shutdown by the user [Service] Type=oneshot RemainAfterExit=true ExecStop=echo $(date;echo "Shutdown") >> $HOME/shutdown.log [Install] WantedBy=multi-user.target
Run
systemctl daemon-reload systemctl enable $HOME/shutdownlogging.service --now
Useful links
How to run a script with systemd right before shutdown
How to find out from the logs what caused system shutdown
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