Bash script in Cron not running Python Script on Ubuntu 20.04.2 LTS

I have an Ubuntu 20.04.2 LTS server which I run few python scripts.

I created a cronjob to run a bash script to check and see if my python script is running:

#!/bin/sh
#!/bin/python2.7


SERVICE="start_server.py"
if ps -ef | grep "$SERVICE" | grep -v grep >/dev/null
then
    echo "start_server.py is running" >> /home/ubuntu/mislaka/script_log.log
else
        python2.7 /home/ubuntu/mislaka/start_server.py &
    echo "start_server.py stopped" >> /home/ubuntu/mislaka/script_log.log
fi

This is the cronjob configuration:

* * * * * /home/ubuntu/mislaka/check_process.sh

When checking the log file I can see it is adding the echo commands to the file but it does not start the python script.

If I run my script outside of the cronjob it is working as expected.

Will appreciate any help.

Thank you!

There are some differences between bash and sh shells. If you are using bash you shoud use:

#!/bin/bash

Found out what was my issue. Instead of writing my command under the else statement in one line, I wrote it in two:

echo "start_server.py stopped" >> /home/ubuntu/mislaka/script_log.log && python2.7 start_server.py &

This fixed my issue.