[CentOS] how to find out the number of updates for a system

Once upon a time, John Pierce <jhn.pierce at gmail.com> said:
> otoh, its pretty rare that an update has a new dependency...    if the
> package is installed, its existing dependencies are also installed, and if
> they have updates, check-update would show them all, would it not?

It's not as rare as you might think, especially at point-release time.
There are often new dependencies when packages get updates beyond just
bug patching, sometimes an installed package might get obsoleted by a
different package (can't remember if that shows up in check-update),
etc.

-- 
Chris Adams <linux at cmadams.net>