On Sun, May 5, 2019 at 10:45 AM Sam Varshavchik <mr...@courier-mta.com> wrote: > > Steve Grubb writes: > > > Rescue mode? I couldn't find it. All references I could find to a rescue > > mode > > date back to 2013 or later. I would have liked a rescue mode because makes > > it > > easy to just chroot into your actual system from the livecd. Seems like > > we've > > lost something nice if its really been dropped. > > Somewhere around that era, installing Fedora added a grub menu entry for > "Rescue" mode. I don't remember exactly what it was supposed to rescue, and > how. > > It's been sitting in the grub menu ever since. > > I have a /boot/vmlinuz-0-rescue-f0fe67c2a80d43d2947358968ab5277e with a 2013 > timestamp. No idea which kernel it is. It appears to be immune to > installonly_limit.
If you see the rescue kernel+initramfs menu entry though, you do not have the bug under discussion, and you don't need to run 'grub2-install' - your GRUB is by definition functioning fine if you see this menu entry. As for what it is, this is a copy of the original kernel installed at the time Fedora was installed by Anaconda. What makes it "rescue" is actually the "no host only" initramfs which is a kitchen sink initramfs that in theory will boot any hardware. The idea is, if you add new hardware and suddenly can't boot, it's likely because the normal "host only" initramfs doesn't have a kernel module for that new hardware; and you can use the "rescue" option as a fall back to boot, and then build a new initramfs for one of your newer kernels. And you're correct, it is never updated. I filed a bug/rfe for dnf system-upgrade about this some time ago, but got some push back on where such function really belongs. And actually it shouldn't be just any arbitrary kernel, ideally it'd be a reasonably well tested kernel perhaps the same one we actually release with. -- Chris Murphy _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org
