Python script doesn't execute via crontab

Question

I read some similar topics but no luck to fix my issue.

This is my first Python script, it runs no problem when I manually execute it.

But it doesn't work with below crontab.

0,15,30,45 * * * * /usr/bin/python /usr/lib/python3.5/venv/send_email_attachment.py >/dev/null 2>&1

I also try to below.

*/2 * * * * /usr/bin/python /usr/lib/python3.5/venv/send_email_attachment.py > /tmp/listener.log >/dev/null 2>&1

The listener.log is generated but empty.

Any idea? Thanks

Answer 1

The form of a cronjob is:

*  *  *  *  * user-name  command to be executed

You forgot to add the user which runs the cronjob. Supposing you run it using the root user, change the code to:

*/2 * * * * root /usr/bin/python /usr/lib/python3.5/venv/send_email_attachment.py > /tmp/listener.log >/dev/null 2>&1

Answer 2

Run this command: sudo /etc/init.d/cron restart

after setting crontab demon has to restart