How To Install and Configure Docker in Ubuntu?

Docker is a platform and service-based product which utilizes OS-level virtualization to deliver software in packages called containers. Containers are separated from one another and bundle their own software, libraries, and configuration files. Docker is written in the Go language. Docker can be installed in two versions Docker CE(Community Edition) and Docker EE(Enterprise Edition). For small-scale projects, or for learning, we can use Docker CE.

Steps for Installing Docker

Step 1: Update Software Repositories using the following command on the terminal.

$ sudo apt update

Step 2: Install Docker using the following command

$ sudo apt install docker.io -y

Step 3: Enable and start the docker service by using the following commands.

$ sudo systemctl enable docker

$ sudo systemctl start docker

Step 4: Check Docker Version.

$ docker --version

Step 5: We will get a permission denied error as a regular user doesn’t have permission to execute docker commands, so we need to add an Ubuntu user to the docker group. 

#sudo usermod -aG docker $USER
    or 
#sudo usermod -aG docker ubuntu

Step 6: Leave the current SSH terminal and re-login with SSH. then carry out.

docker ps

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