In fact, it will even notify you when updates are available.
Once invoked, Ubuntu Update Manager application will appear as illustrated in the following figure: The Update Manager lists the total number of updates that are available for your system together with a list itemizing each update.
It will not work, however, if you have a different Ubuntu version, as this name changes For example, Ubuntu 15.04's name is "Vivid". You can know the name of your version by accessing to THIS WEB PAGE For updates, most of the times this lane don't need to be added to the sources.list, but an editing of the is required instead.
You can find that in a previous update, the lane defining a previous cran R repository has been deactivated by using a "#" .
I think a thread on answers as to how you manage your updates would be very useful.
When it is possible, as patches come out have the central server copy them down to the individual machines.