Re: OT: diagnosis of failure to boot

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On Tue, 11 Aug 2020 12:00:07 -0300
"George N. White III" <gnwiii@xxxxxxxxx> wrote:

> On Tue, 11 Aug 2020 at 11:26, <geoff@xxxxxxxxxx> wrote:
> 
> > Reboot stopped at emergency mode.
> >
> > journalctl -xb does not list any complaints (that I can find), but
> > there's clearly something wrong! Any suggestions as to diagnosis?
> >
> > kernel is 5.7.9.200. selinux is disabled.
> >
> > livecd boot is OK; disk is accessible.
> >
> > I saved the output of journlctl, so its available for
> > interrogation. No obvious complaints
> >
> > Thoughts? Diagnosis?
> >
> 
> Are you using UEFI Secure Boot?
> Was grub2 updated recently?
> Is this a multi-boot system?
> 
> Other distros, including RHEL, have reported boot failures after
> applying updates to grub2 for CVE-2020-10713.

The problem was a bad ssector on /home. Fsck solved it.

Question: how to fsck on / which is mounted and busy in emergency mode?


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