How to install Docker in Ubuntu | Install Docker in Ubuntu

Please find the steps needed for installing Docker in Ubuntu 18.0.4 instance.

sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get update
sudo apt-cache policy docker-ce
sudo apt-get install -y docker-ce
sudo systemctl status docker

now press q to come out this.
ps -ef | grep docker

docker --version

sudo docker run hello-world

the above command should display the below message..

you should see below message 

Hello from Docker!

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

Setup Docker Registry
Now we need to setup Docker registry. You have one of two options.

Option 1 - DockerHub as Docker Registry

Also, create an account(keep all lowercase in your username)  in the below website for storing docker images in public docker registry..

https://cloud.docker.com/
 
Option 2 - Configure Nexus as Docker Registry
Please click below link to configure Nexus as Docker Registry.
https://www.cidevops.com/2020/02/how-to-configure-nexus-as-docker.html

Option 3 - Configure AWS ECR as Docker Registry
Please click below link to configure Amazon ECR as Docker Registry.
https://www.cidevops.com/2020/05/how-to-setup-elastic-container-registry.html 

 
Option 4 - Configure Azure Container Registry
Please click below link to configure ACR in Azure.
https://www.coachdevops.com/2019/12/how-to-upload-docker-images-to-azure.html