Docker cheatsheet

dockercheatsheet.md

Docker container, images, networks management is easy with the prune command which is available for all types of Docker artifacts (see https://stackoverflow.com/a/32723127/4964553 & https://docs.docker.com/config/pruning/#prune-images & https://docs.docker.com/engine/reference/commandline/system_prune/#filtering).

remove all local Docker containers, that are older than

docker container prune --filter "until=48h"

remove all local Docker images, that are older than

docker image prune -a --filter "until=2020-10-25"

run multiple commands with only one single docker run

docker run --rm -v "$PWD":/usr/src/app -w /usr/src/app ruby:2.5 bash -c "bundle install; bundle exec jekyll build -d public; ls -l"

su or sudo not working inside container, since you're another user then root

errors like

$ su root
su: must be suid to work properly

simply use --user root while doing docker exec -it: docker exec -it --user containerId bash

Install ssh and scp to Alpine Docker Container

# optinally add proxy
export HTTP_PROXY=http://proxy.your.lan:8080
export HTTPS_PROXY=http://proxy.your.lan:8080
apk update
apk add openssh

local root erlangen per Docker

docker run -it --rm
--volume $(pwd):/build
--workdir /build
use_some_image bash

Docker Hub Badge

[![Dockerhub badge](http://dockeri.co/image/aveltens/docker-testinfra)](https://hub.docker.com/r/aveltens/docker-testinfra)