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4th chunk of `content/manuals/engine/install/ubuntu.md`
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   This command downloads a test image and runs it in a container. When the
   container runs, it prints a confirmation message and exits.

You have now successfully installed and started Docker Engine.

{{% include "root-errors.md" %}}

#### Upgrade Docker Engine

To upgrade Docker Engine, follow step 2 of the
[installation instructions](#install-using-the-repository),
choosing the new version you want to install.

### Install from a package

If you can't use Docker's `apt` repository to install Docker Engine, you can
download the `deb` file for your release and install it manually. You need to
download a new file each time you want to upgrade Docker Engine.

<!-- markdownlint-disable-next-line -->
1. Go to [`{{% param "download-url-base" %}}/dists/`]({{% param "download-url-base" %}}/dists/).

2. Select your Ubuntu version in the list.

3. Go to `pool/stable/` and select the applicable architecture (`amd64`,
   `armhf`, `arm64`, or `s390x`).

4. Download the following `deb` files for the Docker Engine, CLI, containerd,
   and Docker Compose packages:

   - `containerd.io_<version>_<arch>.deb`
   - `docker-ce_<version>_<arch>.deb`
   - `docker-ce-cli_<version>_<arch>.deb`
   - `docker-buildx-plugin_<version>_<arch>.deb`
   - `docker-compose-plugin_<version>_<arch>.deb`

5. Install the `.deb` packages. Update the paths in the following example to
   where you downloaded the Docker packages.

   ```console
   $ sudo dpkg -i ./containerd.io_<version>_<arch>.deb \
     ./docker-ce_<version>_<arch>.deb \
     ./docker-ce-cli_<version>_<arch>.deb \
     ./docker-buildx-plugin_<version>_<arch>.deb \
     ./docker-compose-plugin_<version>_<arch>.deb
   ```

   The Docker daemon starts automatically.

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

   ```console
   $ sudo service docker start
   $ 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.

You have now successfully installed and started Docker Engine.

{{% include "root-errors.md" %}}

#### Upgrade Docker Engine

To upgrade Docker Engine, download the newer package files and repeat the
[installation procedure](#install-from-a-package), pointing to the new files.

{{% include "install-script.md" %}}

## Uninstall Docker Engine

1. Uninstall the Docker Engine, CLI, containerd, and Docker Compose packages:

   ```console
   $ sudo apt-get purge docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-ce-rootless-extras
   ```

2. Images, containers, volumes, or custom configuration files on your host
   aren't automatically removed. To delete all images, containers, and volumes:

   ```console
   $ sudo rm -rf /var/lib/docker
   $ sudo rm -rf /var/lib/containerd
   ```

3. Remove source list and keyrings

   ```console
   $ sudo rm /etc/apt/sources.list.d/docker.list
   $ sudo rm /etc/apt/keyrings/docker.asc
   ```

You have to delete any edited configuration files manually.

## Next steps

- Continue to [Post-installation steps for Linux](linux-postinstall.md).

Title: Installing, Upgrading and Uninstalling Docker Engine from a Package
Summary
This section details the process of installing Docker Engine from a downloaded package, upgrading Docker Engine using the same method, and completely uninstalling Docker Engine. It includes instructions for downloading the necessary .deb files, installing them using dpkg, and verifying the installation. For upgrades, it advises repeating the installation procedure with the newer package files. The uninstall process covers removing the Docker packages, deleting images, containers, and volumes, and removing source list and keyrings.