Docker is a powerful platform that simplifies the development, shipping, and deployment of applications by using containerization. If you’re using Ubuntu and want to set up Docker, this guide will walk you through the process step-by-step.

Step 1: Update Your System

Before installing Docker, make sure your Ubuntu system is up-to-date. Open your terminal and run:

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sudo apt update
sudo apt upgrade

Step 2: Install Required Packages

Install necessary packages to allow apt to use packages over HTTPS:

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sudo apt install apt-transport-https ca-certificates curl software-properties-common

Step 3: Add Docker’s Official GPG Key

Add Docker’s official GPG key to your system:

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

Step 4: Set Up the Docker Repository

Add Docker’s APT repository to your system:

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

Step 5: Install Docker

Update your package index and install Docker:

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sudo apt update
sudo apt install docker-ce

Step 6: Start and Enable Docker

Start Docker and ensure it starts on boot:

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sudo systemctl start docker
sudo systemctl enable docker

Step 7: Verify Docker Installation

Check if Docker is installed and running correctly by executing:

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sudo docker --version

You should see Docker’s version information. To test Docker’s functionality, run:
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sudo docker run hello-world

Conclusion

Congratulations! Docker is now installed on your Ubuntu system. You can start using it to build and manage containers. For more advanced Docker configurations and usage, check out Docker’s official documentation.