I have a notebook with 2 Linux versions as its main OS options, plus an old FreeBSD install that never worked properly due to hardware incompatibilities. I’d like to reuse the partitions used by FreeBSD for TrueOS but for now preserve Linux as the main OS. IOW, I’d like to continue to be able to run Grub as usual under Linux.
FWIW, that main Linux is an Ubuntu variant running off a ZFSonLinux pool, with a good-ole-ext4 /boot partition.
From what I understand, using rEFind should make that possible because my Grub bootloader sits in an emulated MBR somewhere in a “system” part of that GPT partition table. From what I’ve seen of rEFind on Mac, I’d first get the rEFind bootscreen, containing an option that should take me to the Grub boot screen. The TrueOS boot option would no longer be available at that stage but that’s fine with me (there’s always the 3-finger salute to go back to the rEFind bootscreen).
Can someone confirm?
It’d be even better if someone already has experience with this and post (or point me to) some guidelines, evident mistakes to avoid, etc.
I looked around for existing threads on this but most dual boot topics seem to consider that TrueOS will be the main OS, and (almost) none contain more than a fleeting reference to rEFind.