So rather than repeating "Linux on windows", this is "Ubuntu's userland on windows", or "GNU on windows", or any other variation, but NOT "Linux".
So rather than repeating "Linux on windows", this is "Ubuntu's userland on windows", or "GNU on windows", or any other variation, but NOT "Linux".
Furthermore, only some of the (free) software bundled up as Ubuntu is "GNU". Being copylefted doesn't by itself make something part of the GNU Project.
* https://www.gnu.org/software/software.html#allgnupkgs
The annoying thing was the Microsoft video where twice Rich Turner of Microsoft stopped Russ Alexander to clarify what was happening and gave incorrect clarifications of how things were "running on Linux ... on Windows". They patently are not "running on Linux".
Microsoft has been quite happy to say over all these years that OS/2 1.x programs were "running on Windows" and DOS programs were "running on Windows" and Win16 programs were "running on Windows" and even Win32 programs were "running on Windows", M. Turner. This is just plain "Linux programs running on Windows". There is no need to make it confusing when it actually isn't. (-: