Docker Basics

Images are stopped containers, containers are running images. Images are stored in a central repository called Docker Hub.

docker login

Information about docker:

docker version
docker info

List the current running containers:

docker ps

List containers that have been run previously:

docker ps -a

List images saved locally:

docker images

Pull an image from Docker Hub:

docker pull ubuntu
docker pull ubuntu:14.04

Run an image, searching locally first and pulling from Docker Hub if not found:

docker run ubuntu

Run a container interactively:

docker run -it ubuntu
docker run -it ubuntu /bin/bash

Run a container detached (-d) with the name web (--name), mapping port 80 on the host to port 8080 in the container (-p):

docker run -d --name web -p 80:8080 nigelpoulton/pluralsight-docker-ci

Detach an interactive container to run in the background with CTRL-P + Q.

Stop a container by its name or id:

docker stop web

Stop all containers:

docker stop $(docker ps -aq)

Remove all containers:

docker rm $(docker ps -aq)

Remove all images

docker rmi $(docker images -q)

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