Step-by-Step Guide

1. Update the Package Index
   Open a terminal and update the package index to ensure you have the latest information about available packages:

   sudo apt update

2. Install Necessary Packages
   Install the necessary packages for Docker:

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

3. Add Docker’s Official GPG Key
   Add Docker’s official GPG key to your system:

   curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

4. Set Up the Docker Repository
   Add the Docker APT repository to your system:

   echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

5. Update the Package Index Again
   Update the package index again to include the Docker repository:

   sudo apt update

6. Install Docker
   Install Docker using the apt package manager:

   sudo apt install docker-ce docker-ce-cli containerd.io

7. Verify Docker Installation
   Check the Docker version to ensure it is installed correctly:

   docker --version

You should see the Docker version information displayed.

8. Start and Enable Docker
   Ensure Docker starts on boot:

   sudo systemctl start docker
   sudo systemctl enable docker

9. Add Your User to the Docker Group (Optional)
   To run Docker commands without sudo, add your user to the Docker group:

   sudo usermod -aG docker $USER

Log out and log back in for the changes to take effect, or use the following command to apply the changes immediately:

   newgrp docker

10. Test Docker Installation
    To test Docker, run the hello-world container: docker run hello-world If Docker is installed correctly, you should see a message saying “Hello from Docker!”
11. Install Docker Compose (Optional)
    Docker Compose is a tool for defining and running multi-container Docker applications. To install Docker Compose, download the binary:
    bash sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
    Apply executable permissions to the binary:
    bash sudo chmod +x /usr/local/bin/docker-compose
    Verify the installation:
    bash docker-compose --version