Systemd Timer not executing shell script

Question

I've been trying to put together a very simple shell script that starts redshift, if it is not already running.

#!/bin/sh
if ps -ef | grep -v grep | grep redshift-gtk; then
    exit 0
else
    /usr/bin/redshift-gtk &
    exit 0
fi

I've tried running the script multiple times and I'm sure it works.

I am running Manjaro i3 btw. I've then tried creating a service and timer in /usr/lib/systemd/system/:

/usr/lib/systemd/system/redshift.service

[Unit]
Description=Runs redshift

[Service]
Type=simple
ExecStart=/bin/bash /home/velo/reshift.sh

[Install]
WantedBy=multi-user.target

Yes, the name of the script is reshift.

/usr/lib/systemd/system/redshift.timer

[Unit]
Description=Runs redshift at given intervals
Requires=redshift.service

[Timer]
OnCalendar=*-*-* *:45:00
Persistent=true
Unit=redshift.service

[Install]
WantedBy=multi-user.target

The timer has been changed to whatever relevant minute mark was close by to trigger it. After each change in OnCalender, I've done:

>systemctl daemon-restart
>systemctl restart redshift.timer
>systemctl status redshift.timer

Where I'm told that it is running and enabled. Problem is, nothing is executed whenever the timer hits the mark. Any idea what I'm doing wrong?

Answer 1

Use systemctl list-timers --all to check the status of your timers.

Use systemctl start redshift.timer to start your timer.

Also, you should put your custom scripts under /etc/systemd/system. The /usr/lib location is intended for scripts installed by packages.

See also: Run script every 30 minutes with systemd