$ docker search ubuntu | head

$ docker search --filter is-official=true ubuntu

$ docker search hashicorp

$ curl -s -S 'https://registry.hub.docker.com/v2/repositories/library/ubuntu/tags/' \
  | jq '."results"[]["name"]' | sort

$ docker pull ubuntu:bionic

$ docker tag ubuntu:bionic pruebas:locales

$ docker images ubuntu:*

$ docker image inspect hello-world \
  | jq '.[].Config.Cmd'

$ docker image inspect andygrunwald/simple-webserver:latest \
  | jq '.[].Config.ExposedPorts'

$ docker image inspect andygrunwald/simple-webserver:latest \
  | jq '.[].RootFS.Layers'

$ docker image rmi pruebas:locales

$ docker image prune

$ docker images -f dangling=true

$ docker rmi $(docker images -f dangling=true -q)

$ docker container run -it debian bash

/# apt update
/# apt install -y figlet
/# figlet 'hello docker'
/# exit

$ docker container ls -a
$ docker container commit <CONTAINER-ID>
$ docker image ls

$ docker image tag <IMAGE-ID> configlet
$ docker image ls

$ docker container run --rm configlet figlet moove-it

$ docker run --rm ruby-hello ./hello.rb

$ docker build {CONTEXT}