Introduction

This guide explains how to install Docker on your Linux system using the official get.docker.com script. This method is quick and ensures you have the latest Docker version.

Step 1: Update System Packages

Ensure your system is up to date before proceeding:

sudo apt-get update && sudo apt-get upgrade -y

Step 2: Download and Run the Installation Script

Use the following command to download and execute the Docker installation script:

curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh

The script detects your operating system and installs Docker accordingly.

Step 3: Verify Docker Installation

After installation, verify that Docker is installed and running:

docker --version

This should display the installed Docker version. You can also check the Docker service status:

sudo systemctl status docker

Step 4: Add Your User to the Docker Group (Optional)

By default, Docker requires root privileges. To run Docker without using sudo, add your user to the Docker group:

sudo usermod -aG docker $USER

Log out and log back in for this change to take effect, or run:

newgrp docker

Step 5: Test Docker

Run the following command to test Docker functionality:

docker run hello-world

This downloads a test image and runs it as a container. If successful, you'll see a welcome message.

Troubleshooting

If you encounter issues, try these steps:

• Ensure your user is in the Docker group if you get a permission error.
• Restart the Docker service:

sudo systemctl restart docker

• Check Docker logs for errors:

sudo journalctl -u docker

Official Documentation

Docker is now installed on your system and ready for use. Refer to the Docker documentation for further guidance on managing containers, images, and services.