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Hi, in Windows you can pass the command line parameter -adapter N

Unfortunately I don't think that works on Linux.

Here  is a list of all Unity runtime command line parameters:

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

Perhaps you can start it up in windowed mode, drag the window to the correct screen and the go fullscreen. At least in Windows it is possible to Alt+Enter to toggle between window/full screen mode.

I'm not a Linux user myself so I don't really know of another way. I'm glad you like the sim!