Installation

Install Docker

To install docker follow the instructions on this page.

Test Docker version

Run docker --version and ensure that you have a supported version of Docker:

docker --version

Docker version 17.12.0-ce, build c97c6d6 Run docker info or (docker version without --) to view even more details about your docker installation:

docker info

Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: 17.12.0-ce
Storage Driver: overlay2
...

To avoid permission errors (and the use of sudo), add your user to the docker group.

Test Docker installation

1. Test that your installation works by running the simple Docker image, hello-world:

docker run hello-world

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete
Digest: sha256:ca0eeb6fb05351dfc8759c20733c91def84cb8007aa89a5bf606bc8b315b9fc7
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.
...

1. List the hello-world image that was downloaded to your machine:

   docker image ls

2. List the hello-world container (spawned by the image) which exits after displaying its message. If it were still running, you would not need the --all option:

docker container ls --all

CONTAINER ID     IMAGE           COMMAND      CREATED            STATUS
54f4984ed6a8     hello-world     "/hello"     20 seconds ago     Exited (0) 19 seconds ago

Recap and cheat sheet

## List Docker CLI commands
docker
docker container --help

## Display Docker version and info
docker --version
docker version
docker info

## Execute Docker image
docker run hello-world

## List Docker images
docker image ls

## List Docker containers (running, all, all in quiet mode)
docker container ls
docker container ls --all
docker container ls -aq