How to install docker on Ubuntu 20.04 LTS

In this article i will explain how you can install Docker on UBUNTU 20.04 LTS

To learn more about docker please visit official site

First make sure you will have installed all the updates

sudo apt update -y

Then install docker by running simple command

sudo apt install docker.io

Then make sure docker starts after computer restarts

sudo systemctl enable --now docker

At this opint root user is able to run docker command, but any other user wont be able to use docker. To give permission to any user or current user run

# Current user
sudo usermod -aG docker $USER

#Any other user
sudo usermod -aG docker SOMEUSERNAME

Now you can check docker version

docker version

Restart your compuer so that any user added to added group can run docker command. Now you should be able to run any docker image, here is a simple example


docker run hello-world

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/

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