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

On Wed, May 22, 2019 at 7:49 AM Chris Adams <linux at cmadams.net> wrote:

> Once upon a time, mark <m.roth at 5-cent.us> said:
> > Ralf Prengel wrote:
> > > Hallo,
> > > I need the information how many updates are available for a system.
> > > What is the best way to find it out in a one line bash script.
> > >
> > yum check-update, perhaps?
>
> Note that "yum check-update" or "yum list updates" won't tell you how
> many packages would be installed with "yum update"... dependencies and
> such are not resolved for check-update/list updates.



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?



-- 
-john r pierce
  recycling used bits in santa cruz