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How to Install Docker on Ubuntu? – The Ultimate Guide

Docker has revolutionized the world of software development by introducing a lightweight and efficient containerization platform. By encapsulating applications and their dependencies into isolated containers, Docker simplifies deployment and eliminates compatibility issues. 

Understanding how to utilize Docker on Ubuntu will enhance productivity and enable seamless application deployment. Let’s dive in and discover how to set up Docker on Ubuntu.

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What is Docker?

What is Docker

Docker is an open-source platform that enables programmers to use containerization to simplify the deployment and maintenance of programs. Containers are lightweight, portable, and isolated environments that encapsulate an application and its dependencies. 

By utilizing Docker, developers can build, package, and distribute applications with their configurations, libraries, and dependencies consistently. It provides a standardized workflow for building, shipping, and running applications in different environments. 

Docker simplifies the process of software development, encourages collaboration, and improves scalability. Moreover, it enables you to create a container once and run it on any Linux-based system, known as Ubuntu.

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System Requirements

Before installing Docker on Ubuntu, let’s verify that your system meets the important requirements. Docker is compatible with different versions of Ubuntu, such as Ubuntu 16.04, 18.04, 20.04, and their corresponding derivatives. To aim for optimal performance, use 64-bit Ubuntu. Here are a few requirements listed below:

By ensuring your system meets these requirements, you’ll be ready to proceed with the installation process and unlock the power of Docker on Ubuntu.

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Docker Installation Process on Ubuntu

Docker Installation process on Ubuntu

Installing Docker on Ubuntu is a straightforward process. Follow the steps below to get Docker up and running on your Ubuntu system:

  1. Update Package Lists: Begin by updating the package lists on your system. Open a terminal and run the following command:
sudo apt update
  1. Install Necessary Packages: Docker requires a few additional packages to work correctly. Install them by running the following command:
sudo apt install apt-transport-https ca-certificates curl software-properties-common
  1. Add Docker’s GPG Key: Download and add Docker’s official GPG key to ensure package integrity. Use the following command to import the key:
curl -fsSL | sudo gpg - dearmor -o/usr/share/keyrings/docker-archive-keyring.gpg
  1. Add Docker Repository: Add the Docker repository to your system’s software sources by running the command that matches your Ubuntu version:
echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] focal stable" | sudo tee/etc/apt/sources.list.d/docker.list > /dev/null
echo "deb [arch=amd64 keyring.gpg] signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] bionic stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
echo "deb [arch=amd64signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] xenial stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
  1. Install Docker Engine: Update the package lists once more and proceed to install Docker by running the following command:
sudo apt update
sudo apt install docker-ce docker-ce-cli
  1. Verify Docker Installation: After the installation completes, verify that Docker is installed correctly by running the following command:
sudo docker run hello-world

Congratulations! You have successfully installed Docker on your Ubuntu system. Now you’re ready to start utilizing the power of Docker containers for your development and deployment workflows.

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Uninstall Docker Ubuntu

If you no longer require Docker on your Ubuntu system or need to perform a clean re-installation, it’s essential to uninstall Docker properly. 

To uninstall Docker on Ubuntu, you can follow these steps:

sudo systemctl stop docker
sudo apt purge docker-ce docker-ce-cli
sudo rm -rf /etc/docker /var/lib/docker
sudo userdel -r docker
sudo rm -rf /var/lib/docker
docker --version

By following these steps, you can ensure a clean and complete uninstallation of Docker from your Ubuntu system.


This comprehensive guide has covered the essential aspects of installing Docker on Ubuntu. Docker, a powerful containerization platform, offers numerous benefits for developers and system administrators. Understanding its concept and system requirements is crucial before diving into the installation process. Following the step-by-step instructions, you can successfully install Docker on your Ubuntu system and leverage its capabilities.

The post How to Install Docker on Ubuntu? – The Ultimate Guide appeared first on Intellipaat Blog.

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