A few tweaks to readme for service.

README.md

@@ -81,10 +81,12 @@ See the [API documentation page](https://opendronemap.github.io/WebODM/).
 ## Run the docker version as a Linux Service
 
 If you wish to run the docker version with auto start/monitoring/stop, etc, as a systemd style Linux Service, a systemd unit file is included in the service folder of the repo.
+This should work on any Linux OS capable of running WebODM, and using a SystemD based service daemon (such as Ubuntu 16.04 server for example).
+This has only been tested on Ubuntu 16.04 server.
 
 The following pre-requisites are required:
  * Requires odm user
- * Requires docker installed via system (ubuntu: apt-get install docker.io)
+ * Requires docker installed via system (ubuntu: `sudo apt-get install docker.io`)
  * Requires screen to be installed
  * Requires odm user member of docker group
  * Required WebODM directory checked out to /opt/WebODM
@@ -94,27 +96,27 @@ If all pre-requisites have been met, and repository is checked out to /opt/WebOD
 
 First, to install the service, and enable the service to run at startup from now on:
 ```bash
-systemctl enable /opt/WebODM/service/webodm.service
+sudo systemctl enable /opt/WebODM/service/webodm.service
 ```
 
 To manually stop the service:
 ```bash
-systemctl stop webodm
+sudo systemctl stop webodm
 ```
 
 To manually start the service:
 ```bash
-systemctl start webodm
+sudo systemctl start webodm
 ```
 
 To manually check service status:
 ```bash
-systemctl status webodm
+sudo systemctl status webodm
 ```
 
 The service runs within a screen session, so as the odm user you can easily jump into the screen session by using:
 ```bash
-screen -r webodm
+sudo screen -r webodm
 ```
 (if you wish to exit the screen session, don't use ctrl+c, that will kill webodm, use `CTRL+A` then hit the `D` key)