Question

Unable to execute a python script via crontab, but can execute it manually. What gives?

I’ve written a python script for python 2.7 - its main purpose is to search the directory that it is in for any CSVs that begin with “contact” and end in “.CSV” - it then parses those CSVs and makes some API calls to send the data elsewhere.

It does this successfully using a few modules; namely glob2, requests and CSVmapper.

I’ve installed the dependancies either via pip or easy install successfully - this is proven by the fact that I can execute the script manually from with in the scripts folder on Digital Ocean by typing python my_python_script.py.

Initially, the cron job executed the script, but came back with an error which alerted me to the fact that blob or glob weren’t installed by default, which prompted me to install glob2.

When I fixed this, nothing happened. No logs. No execution. No expected results.

I even tried executing the cron command on the command line:

/usr/bin/python /var/www/client_folder/my_python_script.py &> /var/www/client_folder/log.txt

This printed the expected output to the log file with no error.

In summary: My script works without error when manually executed, but for some reason the cron job is either not executing it, or finding it, or something.

I am accessing the crontab via crontab -e, and this was my original command (i’ve set it for every minute just to test it out) - i’ve also confirmed that /usr/bin/python is indeed where python lives:

* * * * * /usr/bin/python /var/www/client_folder/my_python_script.py &> /var/www/client_folder/log.txt

As an addendum, the python script itself has a chmod of 755 and the csv it’s looking at has a chmod of 644. I am logged in as root, and all of the files regarding this issue were created under root.

I have also tried adding root in the cron command itself, to no avail.

Show comments

Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

@markorapaic Thanks. It helped me as well. March 2, 2016 answer still helping in 2019. Thank You.

Perfectly adding the folder location using ‘’‘cd’‘’ really helped me to solve the issue on Mac

Hello, I have the same problem, cron is not recognizing the jupyter command, i tried:

cd /home/pakin/anaconda3/bin && jupyter nbconvert --execute --to html /home/pakin/Documents/desarrolloWeb/PakinV3o2/chispazo.ipynb

but it does not work. Do you have any suggestion? Greetings.