Is it possible to copy a low-level utility like bash from one docker image to another?

Asked Oct 09 '23 at 21:33

Active Oct 09 '23 at 21:33

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I feel like I am missing something fundamental to lower-level utilities like bash or echo.

I have a docker image (ImageA) that is missing a shell utility so it is nearly un-interactable and I need more flexibility from it. Let's assume I cannot recreate the image.

I know it is a Debian-bullseye distro and I assumed that I could just copy the bash binary from another basic Debian image (ImageB) using Docker multi-stage builds.

I've confirmed it exists in the /bin/ folder of ImageA but any attempts to execute it (or any utility for that matter) does not work with errors like: /bin/bash: no such file or directory.

Has anyone done anything like this and/or is this idea fundamentally flawed?

asked Oct 09 '23 at 21:33

Sam Yi

1

ldd /bin/bash will tell you the libraries that bash need in usual dynamic loading – Gilles Quénot Oct 09 '23 at 21:36
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Possibly related: When you fail to execute a file that depends on a “loader”, the error you get may refer to the loader rather than the file you're executing. – Kamil Maciorowski Oct 09 '23 at 21:40
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Might be easier to copy the static-linked busybox, which will get you a decent shell and a bunch of utilities all in one file. – muru Oct 10 '23 at 10:43

Is it possible to copy a low-level utility like bash from one docker image to another?

0 Answers0