Admin panel not showing

Hello, I just installed the newest Grav, but I can't see the admin panel. I tried mywebsite/admin, and servral other variants, inluding just the IP:

But the admin panel just wont show.

I tried both downloading Grav alone and then the admin plugin next to it, and the grav-admin package, I also added a user beforehand. Any ideas? I really wanted this to work.

Server running Ubuntu 14.10, grav welcome page works as it should (the "Grav is Running!" page)

it should be just your Grav URL with /admin. If that is not working then you have a server setup issue, so please look at this 404 help page in the docs.