RobH  wrote:
> In my case it is because I run Ubuntu on my 2 desktops, of which 1 of
> them just runs 2 specific programs which I want to put or run on the pi4.
> If they run on ubuntu desktop then they will or should run on ubuntu
> server with xubuntu desktop.

No. They have different architectures: your desktop has an Intel or AMD
processor and the Pi has an ARM processor. Just install Raspbian, it has by
far the best support for the Raspberry Pi (and beginners like yourself).

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