在启动时运行python脚本无缓冲？

Question

I have a script that runs in the background, and it is supposed to run 24/7, but some times it crashes. But it's running on my headless pi, so I don't get to see the error messages when it crashes.
I found a solution where I can have the script print to a file "unbuffered"

python -u my_background_script.py > errorfile.txt &

This works, if I activate it manually through ssh. But I want it to run on bootup, so I added that line to my /etc/rc.local and now it won't run. It runs without the "-u", but then it won't write output.
Am I stuck with using some sort of logging module? Thanks

Answer 1

Take a look at Supervisor . Pretty sure it's exactly what you're looking for.

Here's a great tutorial for it too: https://www.digitalocean.com/community/tutorials/how-to-install-and-manage-supervisor-on-ubuntu-and-debian-vps

Hope this helps!

Answer 2

I would add as a cronjob. Use

sudo contab -e

and add

@reboot /path/to/pythonscript

Also make sure the python file was made executable with

chmod +x myfile.py