Docker 'run' command to start an interactive BaSH session

Docker

# Assuming an Ubuntu Docker image
$ docker run -it <image> /bin/bash

Thanks

You can also do it without the /bin/ part
docker run -it ubuntu bash
or if you literally need nothing else but bash...
docker run -it bash

This won't work if your image has a defined ENTRYPOINT. For these cases use:
docker run -it --entrypoint /bin/bash <image>

docker run -it stands for docker run --interactive --tty. Found this info it in man docker-run.

👍
It could be also nice to share current folder between contexts.

docker run -v $(pwd):/root -it node /bin/bash

@arjabbar /bin/bash and bash are not always the same thing. The former is a direct reference to an executable and the latter is detected by searching $PATH for an executable with the name bash.

As for the second line: docker run -it bash does not run bash inside of your image; it downloads the bash:latest image and runs it. It is syntactically equivalent to running docker run -it --entrypoint /usr/local/bin/bash bash

Is there a form of this I can use to log into github as part of the "docker build ."?
My node project uses private npm packages stored in githib. So my build dies with
npm ERR! /usr/bin/git ls-remote -h -t https://github.com/johngrabner/purple_shared_enums_cloud_and_charger.git
npm ERR! remote: Invalid username or password.

I find that when I run docker run -it --entrypoint bash <image> that it does not save any of my changes.

I think it never saves your changes because they are made to the container and not the image itself.
You can save it as a new image like this:
$ docker commit <container_id> new_image_name:tag_name(optional)

As you are on bash, you have to skip it to root or use another terminal (take a note of your container ID)

docker run -it --entrypoint /bin/sh for the images w/o bash.

docker run -it --entrypoint /bin/sh

docker run -it --entrypoint /bin/sh for the images w/o bash.

thank you.. ..you are a savior

if you add --rm the container gets deleted if you exit it ;-)

If you want to interact with an existing container, do:

docker exec -it <name> bash

(alpine has sh)
docker exec -it <name> sh

This won't work if your image has a defined ENTRYPOINT. For these cases use:
docker run -it --entrypoint /bin/bash <image>

🙌 Works for all, just use this!

docker run -it stands for docker run --interactive --tty. Found this info it in man docker-run.

Good to know

I proposed to add a new command docker shell. Please leave your thought and vote

Thanks!

For me none of the above commands worked. I ran docker inspect <image> and got

...
"Cmd": [
  "src/service.py"
],
"Entrypoint": [
  "python"
],
...

I figured out that docker run -it --entrypoint "" <image> sh works in this case.

Thanks for that tip

…

On Sun, Feb 7, 2021, 13:36 RafaelWO ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ For me none of the above commands worked. I ran docker inspect <image> and got ... "Cmd": [ "src/service.py" ], "Entrypoint": [ "python" ], ... I figured out that docker run -it --entrypoint "" <image> sh works in this case. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://gist.github.com/11266726#gistcomment-3623078>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAGYIZPPY2GG27HLHUJOMH3S5Z3LXANCNFSM4NMUTH5A> .

I have this in my Dockerfile to run java 16 (watch out for the modified java.security part)

FROM adoptopenjdk/openjdk16:jre-16.0.1_9-ubi-minimal

ARG RUN_JAVA_VERSION=1.3.8
ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en'
RUN microdnf install curl ca-certificates \
    && microdnf update \
    && microdnf clean all \
    && mkdir /deployments \
    && chown 1001 /deployments \
    && chmod "g+rwX" /deployments \
    && chown 1001:root /deployments \
    && curl https://repo1.maven.org/maven2/io/fabric8/run-java-sh/${RUN_JAVA_VERSION}/run-java-sh-${RUN_JAVA_VERSION}-sh.sh -o /deployments/run-java.sh \
    && chown 1001 /deployments/run-java.sh \
    && chmod 540 /deployments/run-java.sh \
    && echo "securerandom.source=file:/dev/urandom" >> /opt/java/openjdk/conf/security/java.security