[CentOS] Boot failed on latest CentOS 7 update

Sat Aug 1 19:59:41 UTC 2020
david <david at daku.org>

At 12:50 PM 8/1/2020, Kay Schenk wrote:
>Totally and completely on my HP microfiber. Wouldn't get past anything to
>even get me into the grub menu. NOT AMUSED!
>Kay Schenk

I was going to confirm the same, but the system that became 
unbootable was my mail system :-(

Apparently, the SHIM/GRUB bug has hit both Centos 7 and 8.

Too bad Ubuntu is enough different that makes it hard to switch.