How to save python virtual env pip freeze from cron each time the machine starts

Asked Jun 15 '22 at 19:42

Active Jun 15 '22 at 19:53

Viewed 49 times

I am trying to save the output of pip freeze of some of my python virtual enviroments each time my machine starts. So I initially have built the following bash script:

#!/bin/bash
/home/myuser/pathtovenv/bin/pip freeze > /somepath/requirements_`date '+%Y%m%d_%H%M%S'`.txt

It works fine when I execute it in the terminal.

So I added to the crontab:

@reboot cd /path_where_sh_is; ./freeze_venv.sh

and a few other variations:

@reboot /path_where_sh_is/freeze_venv.sh

without success. Why is that? How should I write the crontab line to make it work?

edited Jun 15 '22 at 19:53

asked Jun 15 '22 at 19:42

Alfonso_MA

2

Your script doesn't contain any relative paths. Have you tried `/path_where_sh_is/freeze_venv.sh` instead of using `cd`? – chepner Jun 15 '22 at 19:48
@chepner Yes, that was the first option that I tried. Same result – Alfonso_MA Jun 15 '22 at 19:52
Please check this https://stackoverflow.com/questions/12534135/crontab-not-executing-a-python-script – Mahesh Sandaruwan Jun 15 '22 at 19:56
You haven't said what the result is yet. "without success" could mean any number of things. – chepner Jun 15 '22 at 20:01
@chepner In this case "without success" means that the expected requirements txt file is not created. – Alfonso_MA Jun 15 '22 at 20:05

How to save python virtual env pip freeze from cron each time the machine starts

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