Re: Drops to command prompt; configfile /grub2/grub.cfg needed to boot

[Brian J. Murrell]

On Thu, 2024-07-25 at 08:54 +0200, Pascal Hambourg wrote:
> 
> Then run "grub2-mkconfig > /boot/grub/grub.cfg".

Indeed.  If there were any differences that I had not already edited to
account for and the result of grub2-mkconfig were not *exactly* what is
already in the file.

> Even the UUIDs ?

Yes.  I copied the filesystem byte-for-byte, (i.e. dd if=/dev/sda5
of=/dev/sda7; followed by resizing the filesystem on /dev/sda7), not
just the files in it.  I then changed the UUID of the filesystem on
/dev/sda5.

> 
> Too bad.

Indeed.

> You could put /boot in LVM

I used to be a fan of that in fact.  I think I finally gave up fighting
distro installers that refused to allow you to do that due to the
distros' fears of /boot in LVM.  I think I recall that also became
problematic when the LV became fragmented due to extending it without
space on the disk being available directly subsequent to it.

> So just check if the /boot partition number changed after
> any 
> other partition change.

That's an interesting tidbit.  I don't think I have ever witnessed this
renumbering of extended partitions personally.  Not saying it doesn't
happen.  I have just never experienced it myself.  I do tend to stay
the hell away from partitioning though and only use it to the extent
that I need to bootstrap LVM onto a machine.  Indeed on every disk
other than the boot disk, the entire disk, with no partitions on it is
an LVM PV.

Cheers and thanks for all of your help.  I have my machine booting
without trouble now.

b.