no graphic linux server?

Hi
I found some 4 years old threads but not something updated
I wanna make some multiplayer game
is it possible to make no graphic server side for linux in unity?
I thought about make one in java but it would be extremely difficult to validate every move to make sure no one cheats
Can it be done in unity? and if so… there is any limitation? like C# Scripts and etc?

Unity from 4.x and on have Linux support (albeit it is still in beta, so it might be a bit unstable).

From version Unity 4.1 is supposed to support this. Havent tried yet.

http://unity3d.com/unity/whats-new/unity-4.1
“Linux: Implement nographics batch mode.”
batchmode is a pro only feature

no way to do it in the free version?

nope, no way.