Docker is an open-source platform that automates the deployment of applications inside containers. Containers are lightweight, standalone, and execute the same regardless of the environment. Docker engine is the most essential component of the Docker platform and enables containerization.

This step-by-step guide will show you how to install the Docker engine on Ubuntu 22.10, one of the most popular Linux distributions.

Prerequisites

Before installing Docker engine on Ubuntu 22.10, you need to make sure your system meets the following requirements:

• Ubuntu 22.10 installed on your system
• A non-root user with sudo privileges
• A stable internet connection

Adding Docker’s GPG Key

The first step in installing Docker engine on Ubuntu 22.10 is to add Docker’s GPG key to the system’s package management system. This key is used to verify the integrity of the Docker packages that we will be downloading and installing.

To add Docker’s GPG key, open a terminal window and enter the following command:

$ sudo apt-get update
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Adding the Docker Repository

The next step is to add the Docker repository to Ubuntu 22.10’s package management system. This repository contains the Docker packages that we will be downloading and installing.

To add the Docker repository, enter the following command in the terminal window:

$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

Updating the Package Management System

After adding the Docker repository, it’s essential to update the package management system. This ensures that the system has the latest information about available packages and their dependencies.

To update the package management system, enter the following command in the terminal window:

$ sudo apt-get update

Installing Docker Engine

The final step in installing Docker engine on Ubuntu 22.10 is to install the Docker package. This package contains all the necessary components to run Docker on your system.

To install Docker engine, enter the following command in the terminal window:

$ sudo apt-get install docker-ce

Verifying the Installation

After installing Docker engine, it’s essential to verify the installation to ensure that everything is working as expected.

To verify the installation, enter the following command in the terminal window:

$ sudo docker run hello-world

If the installation is successful, you will see a message indicating that the Docker engine has been set up successfully, and a test container has been run.

Conclusion

Installing Docker engine on Ubuntu 22.10 is a straightforward process that can be completed in a few simple steps. With Docker, you can deploy applications inside containers that are lightweight, standalone, and execute the same regardless of the environment. This guide has shown you how to install the Docker engine on Ubuntu 22.10 and how to verify the installation.