Question
Process id dismiss when ssh connect again
- Posted December 21, 2017
- DevelopmentPython FrameworksUbuntuDebian
In order to execute a task background, I use nohup command.
# nohup python patrol.py &
Everything works well but when I close ssh connection and connect it again, I find the process id does not exist.The python task sends a request to an api every 20 minutes.From the api server console, I find the process still works.However from ps command I can not find the process id
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It’s possible that the program has crashed. I would recommend using
screeninstead ofnohup. You can install it by runningThen, you can start a session by running
screen. This will launch a new bash process that you can runpython patrol.pyin. First, enable logging in order to identify the issue by pressingCtrl-a,H. Run your program, and pressCtrl-a,dto detach from the session, which will keep it running in the background. You can now disconnect from your Droplet and thescreensession will keep running. Keep an eye on the log file and see if it has any information if the process quits again.