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Install Docker

Docker simplifies application containerization. Here's how to install Docker on Ubuntu:

Steps:

  1. Update the package index:

    sudo apt update
sudo apt upgrade -y

  2. Install dependencies:

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

  3. 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

  4. Set up the Docker repository:

    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

  5. Install Docker:

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

  6. Verify the installation:

    docker --version

  7. Enable Docker to start on boot:

    sudo systemctl enable docker

  8. Run Docker without sudo (optional):

    sudo usermod -aG docker $USER
newgrp docker