Install Docker – Open Source Instructions
Here's the quickest way to install Docker on Ubuntu -- required for most container dev and many Kubernetes projects
You need open source Docker to build containers in the standard way and store their images in accessible repositories. This is a foundational part of building apps to run on Kubernetes.
Happily, it’s easy to install open source Docker engine and CLI on any modern Linux. We’ll use Ubuntu desktop as an example, and use snap.
Step 1: Use snap to install Docker
sudo snap install docker
Step 2: Make your user a member of the docker group
It then often makes sense to make your administrative user part of the Docker group, so they can call the Docker CLI without using sudo:
sudo usermod -aG docker $USER
Step 3: Reload group settings
Then you can reload settings for the docker group, making this effective:
Step 4: Test
Now you can test to see if Docker is working and without sudo.
docker run hello-world
If all is well, this will run a test container that prints a message and exits.