I need to ask again this old-fashioned question because the internet is flooded by posts of people struggling with problems contrary to what I have.

UEFI is totally irrelevant here. Dual boots are totally irrelevant here.

The ingredients are:

• I have an old computer that only works in BIOS mode; it does not have a clue of what UEFI is and will not recognize anything about it (at least as far as I could understand);


• I want to install Ubuntu 16.04 (perhaps a later version) on it;


• legacy mode is what the computer wants.


• the system is 64bit

The directions I am asking for are about:

• which image of the Ubuntu distribution should I use?


• where do I find it?


• how should I partition and set up my USB?


• how should I copy the Ubuntu image in the USB?

The desired result is that, at boot time, plugging such an USB drive starts the Ubuntu installer.

Again, doing this with from the UEFI perspective works fine for me; I lack information on this corner 'retro' situation.