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Groups > linux.debian.user > #257411

Re: /etc/fstab question (problem)?

From David Christensen <dpchrist@holgerdanske.com>
Newsgroups linux.debian.user
Subject Re: /etc/fstab question (problem)?
Date 2023-04-20 00:10 +0200
Message-ID <Gmo9X-3ad8-5@gated-at.bofh.it> (permalink)
References (7 earlier) <Gmc8N-334y-1@gated-at.bofh.it> <GmdRf-347G-3@gated-at.bofh.it> <GmmhP-394m-17@gated-at.bofh.it> <GmndT-39D9-23@gated-at.bofh.it> <Gmnxg-39KT-3@gated-at.bofh.it>
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On 4/19/23 14:26, Default User wrote:
> On Wed, 2023-04-19 at 14:03 -0700, David Christensen wrote:
>> On 4/19/23 13:06, Default User wrote:
>>> On Wed, 2023-04-19 at 18:07 +0700, Max Nikulin wrote:

>>>> Perhaps update-initramfs is necessary after restoring of
>>>> /etc/fstab
>>>> in
>>>> any chosen approach.

>> But, I cannot address Max's point about initrd(4).
>>
>>
>> At this point, I would run my daily backups, use an editor to put the
>> original /etc entry back into /etc/fstab, forget about messing with
>> /etc
>> on either file system, and reboot.  After reboot, I would run 'df
>> /etc'
>> and check where /etc is mounted.  If /etc is "Mounted on /", I would
>> run
>> update-initramfs(8), reboot, and look again.

> I'm afraid I don't quit understand why 'If /etc is "Mounted on /", I
> would run update-initramfs(8), reboot, and look again."
> 
> 
> Shouldn't etc always be expected to be mounted under /, as in /etc?
> For example, right now on my computer:
> 
> df /etc
> Filesystem     1K-blocks    Used Available Use% Mounted on
> /dev/nvme0n1p2  23854928 5841492  16776344  26% /


/etc is a subdirectory of the / directory on the Unix "one big file system".


Some file system must be mounted at /.


Additional file systems must be mounted somewhere beneath /.  Where they 
are mounted is call the "mountpoint".  Mountpoints are traditionally 
subdirectories, and traditionally empty.  When a file system is mounted 
there, the root of that file system is visible as the contents of the 
mountpoint.


On my system, the virtual device /dev/mapper/sda4_crypt has a mount 
point of /.  That file system contains a directory /etc.  So, in the 
Unix "one big file system", the directories / and /etc both come from 
the file system on /dev/mapper/sda4_crypt.

2023-04-19 14:38:19 root@taz ~
# df / /etc
Filesystem             1M-blocks  Used Available Use% Mounted on
/dev/mapper/sda4_crypt    11145M 7016M     3542M  67% /
/dev/mapper/sda4_crypt    11145M 7016M     3542M  67% /


AIUI you want the file system on the the partition /dev/nvme0n1p5 to be 
mounted at /tmp.  The way to do that is to put the relevant entry back 
into /etc/fstab:

UUID=6a105a72-f5d5-441b-b926-1e405151ee84 /tmp ext4 defaults 0 2

And then reboot.


> And, would there be anything wrong with, either way, running update-
> initramfs?
> 
> Would that be run as:
> 
> sudo update-initramfs -uv
> 
> ?


Unfortunately, more confusion -- there are two Linux "Initial ramdisk" 
solutions with very similar names -- initrd and initramfs.  Forget about 
those for now.


I would add the /etc entry back into /etc/fstab, reboot, run 'df / 
/etc', and see what happens.


David

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Thread

/etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-18 17:00 +0200
  Re: /etc/fstab question (problem)? Charles Curley <charlescurley@charlescurley.com> - 2023-04-18 17:40 +0200
    Re: /etc/fstab question (problem)? Max Nikulin <manikulin@gmail.com> - 2023-04-18 19:00 +0200
    Re: /etc/fstab question (problem)? <tomas@tuxteam.de> - 2023-04-18 21:10 +0200
      Re: /etc/fstab question (problem)? Tom Furie <tom@furie.org.uk> - 2023-04-18 23:20 +0200
        Re: /etc/fstab question (problem)? <tomas@tuxteam.de> - 2023-04-19 06:40 +0200
          tmp on tmpfs Max Nikulin <manikulin@gmail.com> - 2023-04-19 08:20 +0200
            Re: tmp on tmpfs <tomas@tuxteam.de> - 2023-04-19 08:40 +0200
              Re: tmp on tmpfs Nicolas George <george@nsup.org> - 2023-04-19 09:00 +0200
                Re: tmp on tmpfs tomas@tuxteam.de - 2023-04-19 10:00 +0200
                Re: tmp on tmpfs Celejar <celejar@gmail.com> - 2023-04-24 18:20 +0200
                Re: tmp on tmpfs <tomas@tuxteam.de> - 2023-04-24 19:10 +0200
                Re: tmp on tmpfs Celejar <celejar@gmail.com> - 2023-04-24 19:40 +0200
                Re: tmp on tmpfs Celejar <celejar@gmail.com> - 2023-04-24 18:20 +0200
              Re: tmp on tmpfs Max Nikulin <manikulin@gmail.com> - 2023-04-19 13:10 +0200
                Re: tmp on tmpfs <tomas@tuxteam.de> - 2023-04-19 20:10 +0200
                Re: tmp on tmpfs songbird <songbird@anthive.com> - 2023-04-20 15:00 +0200
              Re: tmp on tmpfs Vincent Lefevre <vincent@vinc17.net> - 2023-04-20 16:20 +0200
                Re: tmp on tmpfs <tomas@tuxteam.de> - 2023-04-20 16:30 +0200
                Re: tmp on tmpfs Vincent Lefevre <vincent@vinc17.net> - 2023-04-20 17:20 +0200
                Re: tmp on tmpfs Jeffrey Walton <noloader@gmail.com> - 2023-04-20 16:30 +0200
                Re: tmp on tmpfs <tomas@tuxteam.de> - 2023-04-20 16:40 +0200
  Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-18 18:00 +0200
  Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-18 22:10 +0200
    Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-18 23:50 +0200
      Re: /etc/fstab question (problem)? Greg Wooledge <greg@wooledge.org> - 2023-04-19 00:00 +0200
      Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-19 02:00 +0200
        Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-19 03:20 +0200
          Re: /etc/fstab question (problem)? Charles Curley <charlescurley@charlescurley.com> - 2023-04-19 04:50 +0200
          Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-19 05:00 +0200
          Re: /etc/fstab question (problem)? David Wright <deblis@lionunicorn.co.uk> - 2023-04-19 05:10 +0200
            Re: /etc/fstab question (problem)? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-04-19 05:20 +0200
              Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-19 11:20 +0200
                Re: /etc/fstab question (problem)? Max Nikulin <manikulin@gmail.com> - 2023-04-19 13:10 +0200
                Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-19 22:10 +0200
                Re: /etc/fstab question (problem)? David Wright <deblis@lionunicorn.co.uk> - 2023-04-19 22:40 +0200
                Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-19 23:00 +0200
                Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-19 23:10 +0200
                Re: /etc/fstab question (problem)? davidson <davidson@freevolt.org> - 2023-04-20 01:50 +0200
                Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-20 03:50 +0200
                Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-20 15:10 +0200
                Re: /etc/fstab question (problem)? rhkramer@gmail.com - 2023-04-21 11:10 +0200
                Re: /etc/fstab question (problem)? Greg Wooledge <greg@wooledge.org> - 2023-04-21 13:20 +0200
                gitification (was Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-20 15:00 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-04-20 15:40 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-20 20:40 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-04-20 22:10 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-21 00:50 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? Jeremy Ardley <jeremy@ardley.org> - 2023-04-21 01:10 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-21 19:50 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? Jeremy Ardley <jeremy@ardley.org> - 2023-04-20 15:40 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? Max Nikulin <manikulin@gmail.com> - 2023-04-20 17:30 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-20 20:30 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? Max Nikulin <manikulin@gmail.com> - 2023-04-22 08:40 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-20 22:50 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-21 00:50 +0200
                Re: gitification (was Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-21 04:40 +0200
                Re: /etc/fstab question (problem)? Dan Ritter <dsr@randomstring.org> - 2023-04-19 22:40 +0200
                Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-19 23:10 +0200
                Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-19 23:30 +0200
                Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-20 00:10 +0200
                Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-20 00:20 +0200
                [SOLVED] Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-20 02:30 +0200
                Re: [SOLVED] Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-20 03:00 +0200
                Re: /etc/fstab question (problem)? Max Nikulin <manikulin@gmail.com> - 2023-04-21 17:20 +0200
                Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-22 00:50 +0200
                Re: /etc/fstab question (problem)? David Wright <deblis@lionunicorn.co.uk> - 2023-04-22 17:30 +0200
                Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-23 04:00 +0200
                Re: /etc/fstab question (problem)? David Wright <deblis@lionunicorn.co.uk> - 2023-04-23 06:20 +0200
                Re: /etc/fstab question (problem)? David Christensen <dpchrist@holgerdanske.com> - 2023-04-23 10:20 +0200
                Re: /etc/fstab question (problem)? Celejar <celejar@gmail.com> - 2023-04-24 18:30 +0200
                Re: /etc/fstab question (problem)? David Wright <deblis@lionunicorn.co.uk> - 2023-04-25 15:00 +0200
                old memory sticks (was Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-23 17:20 +0200
                [SOLVED]: old memory sticks songbird <songbird@anthive.com> - 2023-04-24 03:50 +0200
                Re: /etc/fstab question (problem)? songbird <songbird@anthive.com> - 2023-04-20 15:10 +0200
                Re: /etc/fstab question (problem)? Max Nikulin <manikulin@gmail.com> - 2023-04-20 17:20 +0200
                Re: /etc/fstab question (problem)? David Wright <deblis@lionunicorn.co.uk> - 2023-04-21 06:30 +0200
                Re: /etc/fstab question (problem)? <tomas@tuxteam.de> - 2023-04-21 06:50 +0200
                Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-20 16:30 +0200
                Re: /etc/fstab question (problem)? David Wright <deblis@lionunicorn.co.uk> - 2023-04-19 22:40 +0200
                Re: /etc/fstab question (problem)? Default User <hunguponcontent@gmail.com> - 2023-04-19 22:40 +0200

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