To test our Docker install we will use a container called Hello World.  This command that we will use will download and run the container. When the container is launched it will display text that says that your docker install is good to go. 

You will want to use a command prompt to issue this command. In Windows you can use cmd or PowerShell. In MacOS you can use the  Terminal app. Once you have a terminal window open issue the following command:

docker run hello-world

If this command is successful it should download the hello-world container and display the following (make sure to read it as it does provide helpful information):

Hello from Docker!

This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:

 1. The Docker client contacted the Docker daemon.

 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.

    (amd64)

 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading.

 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal.

To try something more ambitious, you can run an Ubuntu container with:

 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:

 https://hub.docker.com/

For more examples and ideas, visit:

 https://docs.docker.com/get-started/