How do I proceed to update a Server 2008 R2 Core? And to verify that it is up to date?
There are four possible ways to do this. Have a look at this brief TechNet article in which they describe methods for servicing Server Core.
Antoher: log in via RDP.
There is a point (I think 6) to download upadtes.
A for all
Follow through with install.
Reboot as needed.
This is what I do at the moment - on one large server that I want to fully control the uptime of.