engine: enable the systemd service by default after installation

Signed-off-by: David Karlsson <[email protected]>

Author: dvdksn

content/manuals/engine/install/centos.md

@@ -145,9 +145,13 @@ $ sudo yum-config-manager --add-repo {{% param "download-url-base" %}}/docker-ce
 2. Start Docker.
 
    ```console
-   $ sudo systemctl start docker
+   $ 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 Docker Engine installation is successful by running the
    `hello-world` image.
 

content/manuals/engine/install/fedora.md

@@ -142,9 +142,13 @@ $ sudo dnf-3 config-manager --add-repo {{% param "download-url-base" %}}/docker-
 2. Start Docker.
 
    ```console
-   $ sudo systemctl start docker
+   $ 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 Docker Engine installation is successful by running the
    `hello-world` image.
 

content/manuals/engine/install/rhel.md

@@ -146,9 +146,13 @@ $ sudo yum-config-manager --add-repo {{% param "download-url-base" %}}/docker-ce
 2. Start Docker.
 
    ```console
-   $ sudo systemctl start docker
+   $ 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 Docker Engine installation is successful by running the
    `hello-world` image.
 

content/manuals/engine/install/sles.md

@@ -165,9 +165,13 @@ $ sudo zypper addrepo {{% param "download-url-base" %}}/docker-ce.repo
 2. Start Docker.
 
    ```console
-   $ sudo systemctl start docker
+   $ 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 Docker Engine installation is successful by running the
    `hello-world` image.