While running Ubuntu 19.10 64 bit. Was offered an upgrade to Ubuntu 20.04. Offer accepted. Shortly after the upgrade started it stopped with the message
EFI System Partition (ESP) not usable
Your EFI System Partition (ESP) is not mounted at /boot/efi. Please ensure that it is properly configured and try again.
I don't care if the EFI or ESP is not usable. I don't want a bootloader installed. This is a multi boot system with 5 or 6 other Linux installations and I am using rEFind to boot the computer.
Don't want. Don't need. We do this the way I want it done or we format the partition and install something else.
How can I upgrade without installing a bootloader?