@@ -1205,6 +1205,13 @@ This is a full example of the allowed configuration options on Linux:

 }

 ```

+> **Note:** You cannot set options in `daemon.json` that have already been set on

+> daemon startup as a flag.

+> On systems that use `systemd` to start the Docker daemon, `-H` is already set, so

+> you cannot use the `hosts` key in `daemon.json` to add listening addresses.

+> See https://docs.docker.com/engine/admin/systemd/#custom-docker-daemon-options for how

+> to accomplish this task with a systemd drop-in file.

+

 ##### On Windows

 The default location of the configuration file on Windows is