Set up service unit in Ubuntu

_steps.md

Setus

• Put endless.sh in /root
• vi /etc/systemd/system/test.service
• Put content of file test.service
• Reload service: systemctl daemon-reload
• Start service: service test start

Usage later

• Stop: service test stop
• Check status: service test status
  • (code=exited, status=217/USER) => Angegebener User existiert nicht
  • (code=exited, status=203/EXEC) => angegebener Prozess existiert nicht (angegeben werden muss executable mit Parameter, nicht script)
  • (code=exited, status=126) => not executable or permission denied
  • active (running) => alles OK

endless.sh

while true; do sleep 600; done

test.service

[Unit]
Description=endless
After=network.target
StartLimitIntervalSec=0
[Service]
Type=simple
Restart=always
RestartSec=1
User=root
ExecStart=/bin/bash /root/endless.sh

[Install]
WantedBy=multi-user.target