How to set monospace font with .emacs shared between ubuntu and Cygwin

["KARR, DAVID" <dk068x@att.com>]

I have Cygwin emacs 29.4 running on my Windows laptop.  I have an Ubuntu VM running on that laptop, which is running Emacs 27.1.  I am trying to use the same .emacs file through a shared folder.  For most things, this works perfectly fine.  My Cygwin Emacs is using a proper monospace font, but the VM is using a proportional font.  I'd prefer that they both used the same font, but at a minimum, the Ubuntu VM needs to use a monospace font.

In my Cygwin Emacs, I ran "list-fonts" and got this:
-----------------
Fontset: -*-*-*-*-*-*-*-*-*-*-*-*-fontset-default
Fontset: -*-courier new-normal-r-*-*-13-*-*-*-c-*-fontset-standard
Fontset: -outline-Courier New-regular-normal-normal-mono-13-*-*-*-c-*-fontset-startup
-----------------

In my Ubuntu VM Emacs, I did the same and got this:
-------------
Fontset: -DAMA-Ubuntu-normal-normal-normal-*-17-*-*-*-*-0-fontset-auto1
Fontset: -DAMA-Ubuntu-normal-normal-normal-*-13-*-*-*-*-0-fontset-auto2
Fontset: -*-*-*-*-*-*-*-*-*-*-*-*-fontset-default
Fontset: -*-fixed-medium-r-normal-*-16-*-*-*-*-*-fontset-standard
Fontset: -DAMA-Ubuntu Mono-normal-normal-normal-*-17-*-*-*-m-0-fontset-startup
--------------

My .emacs currently has no customization related to fonts, except for "(global-font-lock-mode 1)" (I don't even remember what that does, and the associated descriptions are circular).

What are my options here?