Question 84665 in Docker Question posted in
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How to make change to a file inside a python-slim container? – Docker

I have a FROM python:3.8-slim-buster Dockerfile and I want to make a small change to the entrypoint.sh file. Unfortunately it seems there are no editors, neither vi or ed. Moreover, it is not possible to do apt-get update 🙁

What is the best way to have at least an editor?

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3

Answers


  1. 0

    I had the same issue with alpine images.

    I solved the problem using Multi-Stage Builds in the Dockerfile.

    https://docs.docker.com/develop/develop-images/multistage-build/

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  2. 0

    At the very least apt-get should be available.

    I ended up just doing apt-get install nano.

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  3. 0

    If the change is small, sed might be an option. For instance,

    sed -i 's/foo/bar/g' myfile

    will change all occurences of foo by bar. The -i option means means in-place, so the file will be overwritten.

    Here’s a nice cheatsheet of sed: https://quickref.me/sed.html#sed-examples

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