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Re: A small pre-fix checklist for sick Linux boxes

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>On Wed, 10 Jun 2026 10:07:25 -0400, jayjwa <jayjwa@atr2.ath.cx.invalid> wrote:
>TheLastSysop <thelastsysop@dev.null> writes:
>
>> One small habit that has saved me a lot of time is taking a quick snapshot of
>> the system before I start "fixing" it.
>
>> uname -a ip addr ip route systemctl --failed journalctl -b -p warning..alert
>> --no-pager | tail -100 df -h lsblk -f
>"tail" usually wants -n 100 these days instead. If it's a EFI machine,
>record those entries with efibootmgr. I rsync /etc/ and user
>dotfiles. Try writing a new Sendmail config - from scratch. Note files
>that need special permissions to work. The qemu-bridge-helper program
>and sead-launch is another one. You already got ipv4 route. ipv6 is
>another - it's separate. What else? sysctl -A and any bootloader magic
>as well as kernel command line additions.

Good additions, especially efibootmgr on UEFI boxes.

I would also split the quick capture into "state" and "local policy".  The state
side is things like routes, failed units, storage layout, and recent journal
noise.  The local-policy side is what you mentioned: /etc, selected user
dotfiles, odd permissions, bootloader/kernel-command-line changes, and anything
installed outside the package manager's normal view.

For networking I usually want both families recorded explicitly:

    ip addr
    ip route
    ip -6 route

For UEFI, this is useful before touching disks or bootloaders:

    efibootmgr -v

And yes, `tail -n 100` is the better spelling.  Old habits fossilize.

-- 
TheLastSysop <thelastsysop@dev.null>
"I survived the great rm -rf / rehearsal and all I got was this .signature."

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A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-09 20:28 +0000
  Re: A small pre-fix checklist for sick Linux boxes "Carlos E.R." <robin_listas@es.invalid> - 2026-06-09 22:47 +0200
    Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-09 20:52 +0000
      Re: A small pre-fix checklist for sick Linux boxes not@telling.you.invalid (Computer Nerd Kev) - 2026-06-10 08:33 +1000
        Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-09 22:54 +0000
        Re: A small pre-fix checklist for sick Linux boxes Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-10 09:13 +0100
          Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 08:50 +0000
    Re: A small pre-fix checklist for sick Linux boxes 🇵🇱Jacek Marcin Jaworski🇵🇱 <jmj@energokod.gda.pl> - 2026-06-09 23:27 +0200
      Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-09 22:07 +0000
        Re: A small pre-fix checklist for sick Linux boxes 🇵🇱Jacek Marcin Jaworski🇵🇱 <jmj@energokod.gda.pl> - 2026-06-10 02:24 +0200
          Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 00:26 +0000
            Re: A small pre-fix checklist for sick Linux boxes Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-10 01:06 +0000
              Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 01:10 +0000
              Re: A small pre-fix checklist for sick Linux boxes 🇵🇱Jacek Marcin Jaworski🇵🇱 <jmj@energokod.gda.pl> - 2026-06-11 16:46 +0200
  Re: A small pre-fix checklist for sick Linux boxes Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-10 00:26 +0000
    Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 00:39 +0000
  Re: A small pre-fix checklist for sick Linux boxes Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-10 09:11 +0100
    Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 08:16 +0000
  Re: A small pre-fix checklist for sick Linux boxes c186282 <c186282@nnada.net> - 2026-06-10 04:13 -0400
    Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 08:17 +0000
  Re: A small pre-fix checklist for sick Linux boxes jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-06-10 10:07 -0400
    Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 14:10 +0000
      Re: A small pre-fix checklist for sick Linux boxes Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-06-10 19:55 +0000
        Re: A small pre-fix checklist for sick Linux boxes TheLastSysop <thelastsysop@dev.null> - 2026-06-10 20:18 +0000
    Re: A small pre-fix checklist for sick Linux boxes Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-11 03:19 +0000
      Re: A small pre-fix checklist for sick Linux boxes c186282 <c186282@nnada.net> - 2026-06-11 01:49 -0400
      Re: A small pre-fix checklist for sick Linux boxes rbowman <bowman@montana.com> - 2026-06-11 06:51 +0000

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