I have two Ubuntu systems. The first I'd like to use as a server. Hence I don't have a display or even keyboard for it. The other is my laptop and can connect to the network. Upon bootup, the "server" will go to a lightdm login screen.

First thing I'd like to do is connect my server to my network. But since I don't have a display for it, I'd like to do it somehow using my laptop. Is there a way I can just connect my laptop to the server using ethernet and then configure it? First step: how do I get "in", or bypass the login screen?