Docker download and install binary-CodePudding

The

A few observations:

I saw in one of the comments that you tried to run docker build using this flag but it still did not work. This is because, if you closely observe, that "RUN hugo version" line is "CACHED". And this flag --progress=plain shows intermediate steps of the lines that are not cached or freshly executed. So, if you wish to view the output, you need to first clear your docker build cache and all the dangling images using the commands:

$docker builder prune -a $docker image prune -a

After this step, you will be able to freshly execute all your build steps and will be able to see output of RUN hugo version.

To keep your hugo container running after you spin it from the image you build, you need to specify either CMD or ENTRYPOINT command. The command specified with these dockerfile instructions are executed only when you spin a container from the image that you have already built, not when the image is being built. For example if my dockerfile is:

FROM debian:11.3 RUN apt-get update \ && apt-get install -y --no-install-recommends \ hugo CMD hugo version

The output during build would be: The instruction CMD hugo version is not executed.

After I run a container from this built image via command: Then only I would see the output of this instruction coming.

I hope this helps in building the understanding!