Unet Dedicated Server Possible?

Hi there, I know its a pretty common question recently in these forums, but due to that I'm quite confused.

I read about the Relay server and the Matchmaking server will be cloud hosted by Unity and they'll have a fee, if I'm not wrong. But what I want to know is if its possible to develop and self-host a dedicated server, even if it doesnt have any kind of relay or matcmaking server.

With dedicated server I mean a program you can run on a Linux Server with Batchmode or no graphics....

Unet Dedicated Server Possible?