The backend server is run as a system service and is automatically started when the operating system comes up. There are no command line parameters for the server program itself, the behavior of the backend is entirely controlled by the backend.properties file.
If the backend server must be stopped or started explicitly, the follwing commands sould be used:
$ systemctl stop backend
and
$ systemctl start backend
respectively. To start or stop the backend one must be logged in as 'root' on the machine hosting the backend server.