Dedicated Ubuntu server headless mode

Hi everyone,
I install VMWare to use Ubuntu to test the headless mode (Dedicated Server).

I read that the server doesn't launch automatically.
I done this topic said but I don't know on which gameobject added the script:
http://noobtuts.com/unity/unet-server-hosting
http://noobtuts.com/unity/detect-headless-mode

So Actually I test with a simple project when I clic on "S" button, a synchronised variable is changed in Command function (see attached file) :
The class...

Dedicated Ubuntu server headless mode