Update ubuntu 1010 to 1104 without physical access
I have rented a server in a datawarehouse to host my mysql databases, subversion repositories, websites etc.
I don't have physical access to this server (I don't even know the location of the data warehouse).
I connect over SSH (Putty) to this server.
When I login I get the message that new release "natty" is available (1104).
Run "do-release-upgrade" to upgrade to it.
I've never done an upgrade, so I'm afraid there has to be a reset during the upgrade process and a manual action on the machine itself to restart it.
Is it possible to do this upgrade without manual intervention, can somebody give me perhaps a pointer to a location of a good "howto"
For good understanding: I don't have a graphical user interface, just the command line through Putty. I've installed the utility "screen", but I don't know if it can help me in this case.