ubuntu cron job stopped working

Question

The cron job used to working well and suddenly stopped working

1 * * * *  /usr/bin/python3 /home/roy/update.py

It can still run manually on the command line.

Then I tried to debug it by the following command:

/usr/bin/python3 /home/roy/update.py  2>&1 >> /home/roy/cron_error_report.txt

There is no error shown in the cron_error_report.txt either.

Can anybody help me?

Answer 1

I hope my answer can help others. It really take a long time to figure it out. I moved a file used for my current python program to a shared folder. I exported the shared folder to PYTHONPATH.

So there is no problem while I run the script in the command line. However, cron could not run it. So I have to move the file back to my current folder and the cron starts to work again.

Answer 2

Make sure cron is running

sudo service cron status