Im currently running a python script inside a Screen session through this script in rc.local:

screen -L -dmS pi python /home/pi/truck/main2.py &

But I would like it to run through systemd so I can restart it if the Python script crashes.

I tried creating a service in /systemd/system/myscript.service


ExecStart=/usr/bin/screen -L -dmS pi  python /home/pi/truck/main2.py


But it wont run my script inside the Screen session?

If I get a list of running screens it shows that the screen session "pi" is dead.

  • See me on unix.stackexchange.com, I would be glad to help you there! Commented Dec 13, 2017 at 14:24
  • Is there a particular reason to use Screen at all? Commented Dec 13, 2017 at 15:50
  • I'm running a Raspberry Pi headless and would like to SSH into my script. That's why I'm using Screen.
    – TwinToe
    Commented Dec 15, 2017 at 11:35

2 Answers 2


Type=simple expects the service's main process to continue running forever. Your actual command, however, is telling Screen to do the opposite – start a new session and fork to background.

When Screen does that, systemd assumes the service has exited, and cleans up all leftover processes – including the "backgrounded" Screen process. (This doesn't even count as a "failure".)

To avoid that, either change type to forking, or the Screen -dm option to -Dm.


It will work with Type=simple

Use capital D detach.

screen -Dm

man screen

-d -m   Start screen in detached mode. This creates a new session but doesn't attach  to
               it. This is useful for system startup scripts.

-D -m   This  also  starts  screen in detached mode, but doesn't fork a new process. The
               command exits if the session terminates.

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