Install the `dnf-plugins-core` package (which provides the commands to manage
your DNF repositories) and set up the repository.

```console
$ sudo dnf -y install dnf-plugins-core
$ sudo dnf config-manager --add-repo {{% param "download-url-base" %}}/docker-ce.repo
```

#### Install Docker Engine

1. Install the Docker packages.

   {{< tabs >}}
   {{< tab name="Latest" >}}

   To install the latest version, run:

   ```console
   $ sudo dnf install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
   ```

   If prompted to accept the GPG key, verify that the fingerprint matches
   `060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35`, and if so, accept it.

   This command installs Docker, but it doesn't start Docker. It also creates a
   `docker` group, however, it doesn't add any users to the group by default.

   {{< /tab >}}
   {{< tab name="Specific version" >}}

   To install a specific version, start by listing the available versions in
   the repository:

   ```console
   $ dnf list docker-ce --showduplicates | sort -r

   docker-ce.x86_64    3:{{% param "docker_ce_version" %}}-1.el9    docker-ce-stable
   docker-ce.x86_64    3:{{% param "docker_ce_version_prev" %}}-1.el9    docker-ce-stable
   <...>
   ```

   The list returned depends on which repositories are enabled, and is specific
   to your version of CentOS (indicated by the `.el9` suffix in this example).

   Install a specific version by its fully qualified package name, which is
   the package name (`docker-ce`) plus the version string (2nd column),
   separated by a hyphen (`-`). For example, `docker-ce-3:{{% param "docker_ce_version" %}}-1.el9`.

   Replace `<VERSION_STRING>` with the desired version and then run the following
   command to install:

   ```console
   $ sudo dnf install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io docker-buildx-plugin docker-compose-plugin
   ```

   This command installs Docker, but it doesn't start Docker. It also creates a
   `docker` group, however, it doesn't add any users to the group by default.

   {{< /tab >}}
   {{< /tabs >}}

2. Start Docker Engine.

   ```console
   $ sudo systemctl enable --now docker
   ```

   This configures the Docker systemd service to start automatically when you
   boot your system. If you don't want Docker to start automatically, use `sudo
   systemctl start docker` instead.

3. Verify that the installation is successful by running the `hello-world` image:

   ```console
   $ sudo docker run hello-world
   ```

   This command downloads a test image and runs it in a container. When the
   container runs, it prints a confirmation message and exits.