how to remove an ENV setting from a docker image

Question

I have a docker image which sets HOME and PATH:

[{
  ...
  "config": {
    "HOME=/",
  }
  ...

I know I can replace it, but is it possible to remove it (and let the normal bash profile settings be used instead). I'd prefer not to hack the shell profile files to override it.

Answer 1

I couldn't get @creack's answer to work for me.

In my case I had inadvertently committed some environment variables to an image and I wanted to remove them from the image.

I ended up launching the image and 'unsetting' the environment variable by using -e option with no value for the variable,

For example to unset the environment variable FOO

docker run -it -e FOO IMAGE /bin/bash

Then commit the container

docker commit -m 'removed FOO' CONTAINER_ID IMAGE