And if someone wants to know why it's necessary it is well explained here and here.

@alan_g said in How to launch GUI apps from CLI?: @nikalon you have to "trick" Unity8 into allowing the application to connect. I have not tried it recently, but something like this... https://lists.ubuntu.com/archives/mir-devel/2015-September/001267.html Yes! That works, thank you! For anyone who wants the answer you have to append the paremeter --desktop_file_hint=unity8 or -- --desktop_file_hint=unity8 to a regular binary you want to open. This is the syntax: ./application -- --desktop_file_hint=unity8 Unfortunately the game crashes because of some OpenGL problem that I don't know how to solve yet: library "/vendor/lib/egl/libGLESv2S3D_adreno.so" not found ----- Initializing OpenGL ----- Initializing OpenGL subsystem Using 8 color bits, 24 depth, 8 stencil display shutting down: Unable to initialize OpenGL (glAccum) idRenderSystem::Shutdown() Shutting down OpenGL subsystem Sys_Error: Unable to initialize OpenGL (glAccum) shutdown terminal support But that's an unrelated question that I should ask elsewhere.