Install Docker using a shell script

Estimated reading time: 2 minutes

This installation procedure for users who don’t want to use a package manager to install Docker. The script works on a “best effort” basis to determine your operating system and environment, and attempts to provide reasonable defaults. The script may allow you to install Docker in environments that are not actually supported configurations.

If you can use a package manager, you should use the recommended installation procedure for your operating system instead. Using a package manager ensures that you get upgrades when they are available, and allows you to install a specific version of Docker, rather than the very latest version.

Prerequisites

  • You need sudo access on Linux, or administrator access on Windows.
  • You need curl or wget installed. These instructions use curl, but you can adapt them to use wget.

Install Docker using the install.sh script

Warning: Always examine shell scripts you download from the internet before running them.

  1. Open https://get.docker.com in your web browser so that you can examine the script before running it. This is important because the script will run with elevated privileges.

  2. Run the script, using curl to download it and piping it through sh:

    $ curl -fsSL https://get.docker.com/ | sh
    

    You are prompted for your sudo password. The script determines your operating system, downloads and installs Docker and its dependencies, starts Docker, and attempts to configure your operating system to start Docker automatically.

    Note: Ubuntu or Debian users whose host is behind a filtering proxy may experience failure of the apt-key step during Docker installation. To work around this, use the following command to manually add the Docker key:

      $ curl -fsSL https://get.docker.com/gpg | sudo apt-key add -
    
  3. On Ubuntu or Debian systems, the script attempts to start Docker and to configure the system to start Docker automatically. On RPM-based platforms, use the following command to start Docker:

    $ sudo systemctl start docker
    

    If you have an older system that does not have systemctl, use the service command instead:

    $ sudo service docker start
    

    To configure Docker to start automatically on RPM-based systems, see Configure Docker to start on boot.

  4. If you installed using this mechanism, Docker will not be upgraded automatically when new versions are available. Instead, repeat this procedure to upgrade Docker.

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