On Mon, Apr 3, 2017 at 5:26 PM, Keith Lofstrom <[log in to unmask]> wrote:
> I'm looking for examples (with explanatory comments) of
> customized configuration files to use in the /etc/grub.d
> directory, somewhere out there on the intertubes.

On Thu, Apr 06, 2017 at 01:52:30AM -0400, Tom H wrote:
> If you set "GRUB_DISABLE_RECOVERY=false" in "/etc/default/grub", the
> boot submenu will have single-user entry for every kernel.
> 
> If you set "GRUB_DISABLE_RECOVERY=false" and "GRUB_DISABLE_SUBMENU=y"
> in "/etc/default/grub", the menu will have single-user entry for every
> kernel.

Thanks, that was enough to develop a solution. 
I wrote up what I did here:

http://wiki.keithl.com/grub2single

Keith

-- 
Keith Lofstrom          [log in to unmask]