Running unity without rendering graphics (headless mode) on linux

Hi, I've been trying to run unity in headless mode on linux. There is a headless mode option in build settings in linux, which I have already ticked but still when I turn the play mode on, the graphics are rendered as they do without headless mode being ticked.

 

That setting is for the builds, and not the editor.

 

Then how do I run unity without rendering the graphics?

 

https://docs.unity3d.com/Manual/CommandLineArguments.html

 

I am using "unityprogram -nographics -batchmode". Oddly in Windows it kind of works, but still brings up a window without the close/minimize controls which is a bit annoying.
You need it on Linux in Azure on the DSVM if you want to run on a non-GPU (and much cheaper) VM.