Docker CLI

Docker has a command-line interface. The CLI can be used to interact with docker to do things like pull images, build images from dockerfiles, run containers, inspect containers, and more.

• Docker CLI
  • docker inspect
  • docker pause and unpause
  • run vs exec
  • connect to a container using exec
  • history
  • kill all containers
  • docker info
  • docker top
  • docker rm
  • docker rmi
  • docker container prune
  • docker restart
  • search docker hub for a python container

docker inspect

docker inspect node:16-stretch spits out metadata about the image+tag...

• hash
• tags
• env vars
• entrypoint

docker pause and unpause

docker pause <container-id> 'pauses' the container...

• freezes the process

docker unpause <container-id>

run vs exec

• run starts a new container
• exec runs something on an existing container
• docker exec <container-name> bash
  • opens bash in a container

connect to a container using exec

docker exec -it <container-name> bash

history

docker history node:12-stretch

• see changes in container/image history

kill all containers

docker kill $(docker ps -q)

docker info

docker info

• dumps a bunch of info about the HOST machine running docker...

  • of containers running

  • osType
  • ...more

docker top

• use top to see all process running in a container

docker rm

removes a container

docker rmi

removes an IMAGE

docker container prune

removes all stopped container

docker restart

restarts the container ... some containers don't notice 'restart' signals, like node

search docker hub for a python container

docker search python

searches dockerHub for containers matching the string