On 14/09/18 10:22, o1bigtenor via talk wrote:
So I've installed both of these systems (more than once each) they have their own partitions for everything but boot and efi yet I'm only seeing one system available on grub (depending upon the last install as to which). So I'm doing something wrong!! I tried using grub updating tools (# os-prober) still no joy. The web pages that I'm finding seem to be for an older version of grub and, as usual, I'm finding man pages are like reading cuneiform (which I find unintelligible).
Try installing refind - it is pretty good at detecting multiple OSes. That said, if you have a shared boot partition between installations, then you're going to have a much harder time detecting things, since each OS will run update-grub, and clobber the other's grub.cfg entries. You might be better off writing your own grub.cfg file or customizing scripts in /etc/kernel to handle regenerating grub.cfg when there are kernel updates. Cheers, Jamon