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README

Install a basic systemd timer trigger.

Example

CAPTURE_PATH=$(pwd)/captures ./capture-photo.sh

Install Service

# generate config from shell variables $USER and $PWD
cat ./chrisguest75capturephoto.service.template | envsubst > ./chrisguest75capturephoto.service 

# install the service
sudo ln -s $(pwd)/chrisguest75capturephoto.service /etc/systemd/system/chrisguest75capturephoto.service  

# Start the service
sudo systemctl start chrisguest75capturephoto 

systemctl status chrisguest75capturephoto 

systemctl cat chrisguest75capturephoto.service

Install Timer

# generate config from shell variables $USER and $PWD
cat ./chrisguest75capturephototimer.timer.template | envsubst > ./chrisguest75capturephototimer.timer 

# install the service
sudo ln -s $(pwd)/chrisguest75capturephototimer.timer /etc/systemd/system/chrisguest75capturephototimer.timer

# Start the timer
sudo systemctl start chrisguest75capturephototimer
sudo systemctl enable chrisguest75capturephototimer.timer
# if it doesn't work use enable --now 
sudo systemctl enable --now chrisguest75capturephototimer.timer 

systemctl status chrisguest75capturephototimer 

systemctl cat chrisguest75capturephototimer.timer

Troubleshooting

# logs for service
journalctl -b -u chrisguest75capturephoto.service --no-pager
journalctl -b -u chrisguest75capturephototimer.timer --no-pager

Remove

# stop the service
systemctl stop chrisguest75capturephoto 
systemctl disable chrisguest75capturephototimer.timer 
systemctl --user stop chrisguest75capturephototimer.timer    

# if a timer is failing to be removed "not-found"
systemctl reset-failed   
# remove the service
sudo rm /etc/systemd/system/chrisguest75capturephoto.service

Resources

  • Run script every 30 min with systemd here
  • How to set environment variable in systemd service? here
  • Systemd timers onCalendar (cron) format explained here