Re: [gentoo-user] Re: How to set up drive with many Linux distros?

[eric <eriic1@cox.net>]

On 2/26/24 11:01, Grant Edwards wrote:
> On 2024-02-26, eric <eriic1@cox.net> wrote:
>> On 2/26/24 04:57, gentoo-user@krasauskas.dev wrote:
>>> You could also write a script that keeps all the distros up to date
>>> from within whichever one you're currently booted by mounting
>>> subvolumes to /mnt or wherever, chrooting in and running the update.
>>
>> To avoid grub not being able to point to a newly updated kernel on one
>> of the OS's installed, I use a "custom.cfg" file in all my /boot/grub/
>> directories for each OS where the "linix" and "initrd" point to the
>> symbolic links of the kernel and init files which point to the newly
>> updated files on most major distributions like ubuntu, arch, suse, and
>> debian. The name of the symbolic links stay the same over upgrades. It
>> works great when using UUID to identify the partition that has root and
>> I can always boot into any of the OS's installed no matter which one
>> hijacked the MBR.
> 
> Except I generally have multiple kernels installed for each of the
> distros, and need to be able to choose which kernel to boot. There are
> also various other boot options (e.g. "safe mode") offered by some
> distros that I occasionally need to use.
> 

I agree, using the custom.cfg file would not work if needing to boot 
different kernels of the same OS and those kernels were being updated.

Regards,
Eric