I would like to set some Ubuntu Server VM's to always pull updates (nightly) with out asking?
There is an article here that will tell you how to disable the update pop-up.
You then need to run
from root's crontab
i wouldn't recommend unattended updates, but you can do something like this:
create a file...
then in root's crontab, add a line:
this will kick off your
in root's crontab
if you want to download only: