You answer is as much relevant as mine.
If the guy installed a server, he does the same again and it updates.
If he knows that, he already knows all the steps you mentioned as it is how he installed his server.
:IS2:The real answer is look at the pinned thread called "How to host a Killing Floor 2 Server" in this forum.. read the wiki page once at least, then come back to us if you can't understand.