CentOS - Aug 2020 - 8.2.2004 Latest yum update renders machine unbootable

><snip>


> >> Yes .. it should be on mirror.centos.org now .. you could change
the
> >> repo where your updates come from.?  OR .. wait for that mirror to
get
> >> updated.
> >
> >
> > I just did
> > yum clean all
> > yum update
> >
> > and 15-8 showed up.?  Maybe the 'clean all' 
> did it, or maybe just showed up.
> >
> > I applied the update (yum update), rebooted and...
> > no boot.?  Just a blank screen.
> >
> > Hardware is a Mac-Mini :-(
> >
> > This is not an essential machine, so I could re-install (from
> > netinstall) if you think it's worth the effort.
> >
> > Or what?
> >
> > David
>
>You just need to reinstall the kernel and it should work.
Sorry for being so ignorant, but I don't 
understand "just reinstall the kernel".  I don't 
know how to translate that into a specific yum or rpm command.

However, since this is a crash-and-burn system, 
I'm going back to a virgin install with 
netinstall of 7 2003.  I'll let you know what the results are.

---------------


On a Mac-Mini, which got hit by the bug in shim, 
I re-installed Centos 7 2003 from netinstall, 
selecting minimal as the software selection.

The reboot worked fine.

So, I next tried "yum -y update", noticed shim 
7-8 got selected.  However, at the completion of 
the update, I did a reboot and got a blank screen.  No grub choices.  Not good.

David