See the following forum post. It explains how to set up a dedicated server for Linux and also Windows based systems to be controlled through automated scripts and where to change settings. The thread is about an older version of the server binaries but it's still exactly the same method as of today (14th of April 2020).
LINUX & WINDOWS:
http://www.runningwithrifles.com/phpBB3/viewtopic.php?f=4&t=3492&p=18761#p18761
Below is a "Steam Community Guide" which is an easy to understand installation tutorial on how to install a RWR server on a headless Debian 10 (Buster) on a vm or bare metal system.
LINUX
https://steamcommunity.com/sharedfiles/filedetails/?id=2065204709