On Wed, 24 Jan 2018, Bill Maidment wrote:

> It appears that I need to do yum install grub2-efi-modules (why wasn't this done before? I ask).

Packages are partitioned into a main and sub-packages, so that 
the bloat of un-needed matter is avoided.  UEFI is relatively 
new, and until Windows 10, not really mandated by Microsoft 
installations.  Also the needed hardware (a TPM chip) was not 
universally present, and so that sub-package would seem to be 
bloat to most people

As to how to get a copy, using an second machine to retrieve 
the needed package, and placing it on a data stick comes to  
mind.  If no second machine is at hand, booting into Windows 
and getting it comes to mind.  Also, an 'everything' ISO will 
fit on an 8 or 16 G datastick, so one can 'pull the full 
archive' and if there is a dependency problem it might be 
resolved.  It is worth keeping a copy around for times like 
this ;)

-- Russ herrold