debug docker image file system by entering at shell

Readme.md

How to debug a docker container by entering the shell because I always forget

If not already a service add keep alive to the Dockerfile

ENTRYPOINT ["tail", "-f", "/dev/null"]

Then to enter shell do the following

docker build --no-cache --progress plain -t imagetodebug .
docker run imagetodebug &
# get last launched container
export docker_container=$(docker ps -lq) && echo $docker_container
docker exec -ti $docker_container /bin/bash

After done

exit
docker stop $docker_container
docker rm $docker_container
docker image rm imagetodebug