Re: File real location

From	Chris Davies <chris-usenet@roaima.co.uk>
Newsgroups	comp.os.linux.misc
Subject	Re: File real location
Date	2011-04-27 16:31 +0100
Organization	Roaima. Harrogate, North Yorkshire, UK
Message-ID	<dgpl88xojo.ln2@news.roaima.co.uk> (permalink)
References	<pkaj88-cg8.ln1@myleafnode.oneyv.org> <87pqo9apss.fsf@araminta.anjou.terraraq.org.uk> <ip6vck$hod$2@news.albasani.net> <91og0jFfucU15@mid.individual.net>

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notbob <notbob@notbob.invalid> wrote:
> and st_dev are.  If a "filesystem is not mounted", how could there be
> any root (/) dir?  If the dir foo has not been mounted how can one put
> a file into a dir that doesn't exist ...in a filesystem that hasn't
> been mounted?

    $ df -h /mnt
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/sda5             464M  180M  261M  41% /
    $ echo 'this is on root' > /mnt/foo
    $ ls -l /mnt/foo
    -rw-r--r-- 1 chris chris 16 Apr 27 16:26 /mnt/foo
    $ sudo mount /dev/mapper/vg-mnt /mnt
    $ df -h /mnt
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/vg-mnt   1008M   34M  924M   4% /mnt
    $ ls -l /mnt/foo
    ls: cannot access /mnt/foo: No such file or directory
    $ echo 'this is on mnt' > /mnt/foo
    $ ls -l /mnt/foo
    -rw-r--r-- 1 chris chris 15 Apr 27 16:28 /mnt/foo
    $ cat /tmp/foo
    this is on root
    $ sudo umount /mnt
    $ ls -l /mnt/foo
    -rw-r--r-- 1 chris chris 16 Apr 27 16:26 /mnt/foo
    $ cat /tmp/foo
    this is on root

Chris

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File real location JimR <NotReallyMyEmail@example.net> - 2011-04-26 13:06 -0400
  Re: File real location Richard Kettlewell <rjk@greenend.org.uk> - 2011-04-26 18:24 +0100
    Re: File real location The Natural Philosopher <tnp@invalid.invalid> - 2011-04-26 18:28 +0100
      Re: File real location notbob <notbob@notbob.invalid> - 2011-04-26 18:08 +0000
        Re: File real location Richard Kettlewell <rjk@greenend.org.uk> - 2011-04-26 19:14 +0100
        Re: File real location Tim Watts <tw@dionic.net> - 2011-04-26 19:25 +0100
        Re: File real location unruh <unruh@wormhole.physics.ubc.ca> - 2011-04-26 18:43 +0000
        Re: File real location Chris Davies <chris-usenet@roaima.co.uk> - 2011-04-27 16:31 +0100
    Re: File real location Tim Watts <tw@dionic.net> - 2011-04-26 19:08 +0100
    Re: File real location JimR <NotReallyMyEmail@example.net> - 2011-04-26 14:43 -0400
      Re: File real location Richard Kettlewell <rjk@greenend.org.uk> - 2011-04-26 20:28 +0100
        Re: File real location JimR <NotReallyMyEmail@example.net> - 2011-04-26 17:00 -0400
  Re: File real location The Natural Philosopher <tnp@invalid.invalid> - 2011-04-26 18:27 +0100
  Re: File real location "Chris F.A. Johnson" <cfajohnson@gmail.com> - 2011-04-26 13:44 -0400
  Re: File real location unruh <unruh@wormhole.physics.ubc.ca> - 2011-04-26 17:52 +0000

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