As you may have already worked out Xorg is the underlaying graphics management software for Linux (and other OS) desktop GUIs. It is not needed (or desired) on a server. Apparently the old version of VBox addons automatically detected if Xorg was installed and if not didn't install the mouse and graphics drivers. It looks like the new installer does too, but gives an error message when it can't find an x-server.
So it looks like it should be installed ok. The VBoxControl --help and VBoxService --help commands are to check it's all running. You wil need to restart before it will be running. So bottom line is that I think you've done it! Just reboot (if you haven't already) and providing you get the same (or similar) output as in that thread then you should be all systems go.
The only thing I'm not sure about is how you will get the feature working with a Linux server (such as TKL).
According to the link you provided looks ok.
As you may have already worked out Xorg is the underlaying graphics management software for Linux (and other OS) desktop GUIs. It is not needed (or desired) on a server. Apparently the old version of VBox addons automatically detected if Xorg was installed and if not didn't install the mouse and graphics drivers. It looks like the new installer does too, but gives an error message when it can't find an x-server.
So it looks like it should be installed ok. The VBoxControl --help and VBoxService --help commands are to check it's all running. You wil need to restart before it will be running. So bottom line is that I think you've done it! Just reboot (if you haven't already) and providing you get the same (or similar) output as in that thread then you should be all systems go.
The only thing I'm not sure about is how you will get the feature working with a Linux server (such as TKL).