How to Install Docker CE on Ubuntu 18.04 Bionic LTS Step By Step

Docker CE Ubuntu 18.04 - Get Started

7. Testing Docker Installation.

   With:

   sudo docker run hello-world

   Or:

   docker run hello-world

   Then Docker will Pull the Repo and Greets you with:
   Hello from Docker! :)

8. How to Quick Start with Docker and Docker Containers

   Docker Quick Start Guide

   Docker Quick Start for Linux