On 7/12/25 3:25 PM, George N. White III wrote:
On Sat, Jul 12, 2025 at 6:08 PM Samuel Sieb <sam...@sieb.net <mailto:sam...@sieb.net>> wrote:

    On 7/12/25 1:57 PM, Patrick Dupre via users wrote:
     >> Booting multiple Fedora installs from the same grub can be
    tricky.  I
     >> think the easiest way is for one of the grub configs to have an
    entry to
     >> chain to the other config.
     >>
     > Yes, How I could chain 2 /boot ?

    I think you just add an entry to the primary grub cfg that runs
    "configfile path_to_other_grub_cfg".  You'll have to figure out what
    the
    path is, probably starting with "(hd1)".

    Looks like you can put the menu entry in /boot/grub2/custom.cfg.



I have used:

#!/usr/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

menuentry "Boot from <name> Drive" {
     set root=UUID=<UUID>
     linux /vmlinuz root=/<UUID> ro
     initrd /initrd.img
}

I think you can put the menuentry in the file I mentioned and it will get loaded at runtime. The way you're doing it requires you to re-generate the grub config if you make any changes.

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