"home user" asked:
> How do I rescue the rescue mode?
I think the root cause of the problem is that you have upgraded multiple times, and somewhere along the way (maybe around the F25 timeframe), the management of the rescue image and its grub entry got lost by the release and testing teams, and never removed or upgraded. It is still there and not getting cleaned up by any of the upgrades, but waay out of date and missing more than a few critical bits now. This is probably one of the casualties of allowing testing on VMs instead of real machines and insufficient release acceptance criteria. So for your situation, its dead, Jim.
You may be able to recover using the install media like you can in Ubuntu or Debian or Slackware, but I had no luck with keeping the filesystem contents intact using the default one-disk layout on Fedora 30. I probably didn't have the obscure document available on how to actually do this, so YMMV of course.
Failing that and assuming that you don;t have a petabyte or so of LVM content, it may be possible to mount the existing LVM volumes from the install media, in order to copy off a backup of what you need to keep undamaged, and reinstall from scratch.
On Sat, Mar 14, 2020 at 8:34 PM Samuel Sieb <samuel@xxxxxxxx> wrote:
On 3/14/20 12:53 PM, home user wrote:
> I chose the line
> "Fedora (0-rescue-[32 hex digits]) 30 (Thirty)"
That's probably not what you think it is. By default the initrds have a
very limited number of drivers, intended to be the minimum required to
boot the current hardware. The rescue image has the full complement of
drivers so that if you change your hardware or move the drive to a
different computer, you will still be able to boot it. Unfortunately,
that initrd is never rebuilt with newer kernels and also doesn't
necessarily include 3rd party drivers.
> My preference is for the rescue mode to use the most recent release
> practical up to and including f30 (not 31!). I do now have Fedora live
> on a USB stick, but as I noted (in different words) when I closed the
> "prep. for upgrade" thread, it's glitchy. So I'd like to have this
> second fall-back.
>
> How do I rescue the rescue mode?
If you delete the existing rescue kernel and initrd from /boot, the next
kernel install will generate a new one. However, what you're really
looking for, you already have with the live boot. If you boot from the
live image, in the grub menu is a troubleshooting submenu. In there
you'll find the memtester option.
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