Re: /etc/fstab question (problem)?

From	Default User <hunguponcontent@gmail.com>
Newsgroups	linux.debian.user
Subject	Re: /etc/fstab question (problem)?
Date	2023-04-19 03:20 +0200
Message-ID	<Gm4Eh-2Yu3-1@gated-at.bofh.it> (permalink)
References	<GlUYh-2So8-5@gated-at.bofh.it> <GlZOh-2VD6-7@gated-at.bofh.it> <Gm1n3-2Wru-1@gated-at.bofh.it> <Gm3oR-2XAt-7@gated-at.bofh.it>
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On Tue, 2023-04-18 at 16:53 -0700, David Christensen wrote:
> On 4/18/23 14:42, Default User wrote:
> > On Tue, 2023-04-18 at 13:03 -0700, David Christensen wrote:
> > > On 4/18/23 07:59, Default User wrote:
> > > > Hey, I have a strange situation!
> > > > 
> > > > I just realized that my /tmp partition is not being mounted at
> > > > startup.
> > > > Instead, I think the filesystem may be allocating space in
> > > > another
> > > > partition (maybe /root?) for tmp stuff.
> 
> > > My / (root) and /tmp directories are on the same file system --
> > > the
> > > root
> > > filesystem:
> > > 
> > > 2023-04-18 12:46:41 root@taz ~/taz.tracy.holgerdanske.com
> > > # stat -c %d / /tmp
> > > 65024
> > > 65024
> 
> > stat -c %d / /tmp
> > 66306
> > 66306
> > (I am not sure what that means - is that saying that /tmp is
> > mounted
> > under / on the / partition?)
> 
> 
> stat(1) is saying that the file system entries "/" and "/tmp" have
> the 
> same "device number".  Device numbers should be unique for the
> various 
> file systems that are mounted on one computer:
> 
> # mount | perl -ane '$_=$F[2];$dev=(stat)[0];print"$dev $_\n"' | sort
> -n
>   /run/user/13250/doc
> 5 /dev
> 6 /sys/kernel/security
> 7 /sys/kernel/debug
> 11 /sys/kernel/tracing
> 19 /dev/mqueue
> 20 /sys
> 21 /proc
> 22 /dev/pts
> 23 /run
> 26 /dev/shm
> 27 /run/lock
> 28 /sys/fs/cgroup
> 29 /sys/fs/pstore
> 30 /sys/firmware/efi/efivars
> 31 /sys/fs/bpf
> 32 /proc/sys/fs/binfmt_misc
> 33 /dev/hugepages
> 34 /sys/fs/fuse/connections
> 35 /sys/kernel/config
> 39 /samba/dpchrist
> 40 /samba/groupshare
> 42 /run/user/13250
> 50 /run/user/0
> 2049 /boot/efi
> 2050 /boot
> 65024 /
> 65026 /scratch
> 
> 
> That said, I think I prefer the df(1) solution posted by Greg
> Wooledge.
> 
> 
> > (And BTW, the current /etc/fstab must have been written by some
> > program, not manually by me.  I would never have edited /etc/fstab
> > to
> > look like that!) My best guess is that I may have done a system
> > restore
> > using Timeshift on 2023-04-03, to back out of some unremembered
> > problem, and the current /etc/fstab results from that.
> 
> 
> Backing up system configuration files is good.
> 
> 
> I use a version control system (CVS), create a project for each host,
> and check in every system configuration file I create, update, or 
> delete.  I also keep a log.txt file for each system, write notes to 
> myself, save console sessions, etc., for when I do need to remember
> what 
> I did, when, and why.  Rather than restoring entire system
> configuration 
> files, I typically use an editor and restore specific settings.
> 
> 
> > I COULD just continue as is with the current setup, but I would
> > REALLY
> > prefer not to!
> 
> 
> Why not?
> 
> 
> > Maybe I should just start by using Clonezilla to do a full image of
> > the
> > drive. Actual data of course, not the entire 256 Gb!
> 
> 
> Putting your data on a different device than your OS allows you to 
> optimize device usage and backup, restore, archive, imaging, etc., 
> procedures.
> 
> 
> > More later . . .
> 
> 
> David
> 

I have made 2 backups of the ssd, using Clonezilla.
1) a full disk backup,from which the whole disk can be restored.
2) a partitions backup, from which any or all of the individual
partitions can be restored.
Both have been checked by Clonezilla to be restorable.

(Not so) fun fact: Clonezilla always refuses to back up swap
partitions. I don't know why.

FWIW:
df /tmp
Filesystem     1K-blocks    Used Available Use% Mounted on
/dev/nvme0n1p2  23854928 5841496  16776340  26% /

Several different approaches to solve the problem have been suggested. 
I think I will wait until tomorrow and ponder the options, before
performing "surgery".

Note: It was asked why I don't just use the current setup, with no 
/tmp partition.  I guess it goes back to years ago, when I used OpenBSD
for a while. They really pushed the idea of having at least /, /tmp,
/var, swap, and /home partitions. I think the idea is that if something
happens to one partition, it won't affect the others. Like if a process
unexpectedly fills up one partition (/tmp /var, etc.) it probably won't
send the whole system crashing down.

Finally, after the current situation is resolved, I would still like to
know what caused the problem in the first place. I would really like to
not have it happen again!

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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