Install docker on Ubuntu

 Source: https://docs.docker.com/engine/install/ubuntu/

Section: Install using the convenience script

$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

<output truncated>

If you would like to use Docker as a non-root user, you should now consider adding your user to the “docker” group with something like:

  sudo usermod -aG docker your-user

Remember to log out and back in for this to take effect!

The Docker service needs to be setup to run at startup. To do so, type in each command followed by enter:

sudo systemctl start docker

sudo systemctl enable docker

Log out

$ logout

Then run docker example

docker run -it ubuntu bash

OR

docker run hello-world