How to Install Docker on Linux: A Step-by-Step Guide

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Introduction

Docker is a powerful platform that allows developers and system administrators to build, deploy, and manage containerized applications. Containers provide a lightweight and portable solution for running applications with all their dependencies, making it easier to develop, test, and deploy software across different environments. Docker has become an essential tool in modern DevOps workflows, and its popularity continues to grow.

In this blog post, we’ll walk you through the process of installing Docker on Linux. We’ll cover the installation steps for some of the most popular Linux distributions, including Ubuntu, CentOS, and Fedora. By the end of this guide, you’ll have Docker up and running on your Linux system, ready for you to explore its powerful features.

Installing Docker on Ubuntu

To install Docker on Ubuntu, follow these steps:

  1. Update the package lists on your system:
sudo apt update
  1. Install the necessary packages to allow apt to use a repository over HTTPS:
sudo apt install apt-transport-https ca-certificates curl gnupg lsb-release
  1. Add Docker’s official GPG key:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
  1. Add the Docker repository to your system:
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
  1. Update the package lists again to include the Docker packages from the newly added repository:
sudo apt update
  1. Install Docker Engine:
sudo apt install docker-ce docker-ce-cli containerd.io
  1. Verify that Docker is installed and running:
sudo docker run hello-world

Installing Docker on CentOS

To install Docker on CentOS, follow these steps:

  1. Install the necessary packages to set up the Docker repository:
sudo yum install -y yum-utils
  1. Add the Docker repository to your system:
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
  1. Install Docker Engine:
sudo yum install -y docker-ce docker-ce-cli containerd.io
  1. Start the Docker service and enable it to start on boot:
sudo systemctl start docker
sudo systemctl enable docker
  1. Verify that Docker is installed and running:
sudo docker run hello-world

Installing Docker on Fedora

To install Docker on Fedora, follow these steps:

  1. Install the necessary packages to set up the Docker repository:
sudo dnf -y install dnf-plugins-core
  1. Add the Docker repository to your system:
sudo dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo
  1. Install Docker Engine:
sudo dnf install -y docker-ce docker-ce-cli containerd.io
  1. Start the Docker service and enable it to start on boot:
sudo systemctl start docker
sudo systemctl enable docker
  1. Verify that Docker is installed and running:
sudo docker run hello-world

Conclusion

Docker is a powerful and versatile platform for containerization, and it has become an indispensable tool for developers and system

administrators alike. Installing Docker on Linux is a straightforward process, and with this guide, you should now have Docker up and running on your Linux distribution of choice.

Whether you’re deploying microservices, automating development workflows, or experimenting with containerized applications, Docker provides a robust and flexible environment for all your containerization needs. As you explore the world of Docker, you’ll discover a vibrant ecosystem of tools, images, and resources that can help you get the most out of containers.

We hope you found this tutorial helpful, and we encourage you to dive into the world of Docker and experience the benefits of containerization firsthand. Happy Dockering!

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