Re: SanDisk USB stick problem [solved]

From	Joe <joe@jretrading.com>
Newsgroups	linux.debian.user
Subject	Re: SanDisk USB stick problem [solved]
Date	2020-12-09 20:50 +0100
Message-ID	<BkdDj-6K6-5@gated-at.bofh.it> (permalink)
References	<BjN6b-732-19@gated-at.bofh.it> <BjZqF-6ps-1@gated-at.bofh.it> <BkdjY-6Dw-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, 9 Dec 2020 12:22:28 -0700
Fred <fred@blakemfg.com> wrote:

> When I was denied permission to write a file to the device as a
> regular user I checked the permissions and then discovered root could
> not change them.  Being a hardware oriented person I was concerned
> the SecureAccess software needed to change a write protect bit in the
> device and decided to ask for help.  I should have tried writing to
> the device as root but being very busy I didn't.  It is writable by
> root and anyone can read it so there is no problem.

I believe a mount point will always be owned by root, regardless of the
permissions of the underlying directory, because only root is allowed
to mount things. The device mounted on the mount point will normally be
owned by the logged-in user, unless /etc/fstab contains instructions to
the contrary. A device mounted while no user is logged in will be owned
by root (again, subject to fstab), something that usually happens if an
external drive has been left attached after shutting down. 

It's generally a bad idea to boot with an external medium attached,
unless it's bootable and you explicitly want to boot it. If it isn't
bootable, it will either be mounted as root (which may not prevent
other users writing to it) or the BIOS may hang.

-- 
Joe

Thread

SanDisk USB stick problem Fred <fred@blakemfg.com> - 2020-12-08 16:30 +0100
  Re: SanDisk USB stick problem steve <dlist@bluewin.ch> - 2020-12-08 16:50 +0100
    Re: SanDisk USB stick problem Fred <fred@blakemfg.com> - 2020-12-08 20:50 +0100
  Re: SanDisk USB stick problem l0f4r0@tuta.io - 2020-12-08 16:50 +0100
  Re: SanDisk USB stick problem Stefan Monnier <monnier@iro.umontreal.ca> - 2020-12-08 17:00 +0100
    Re: SanDisk USB stick problem Fred <fred@blakemfg.com> - 2020-12-08 20:50 +0100
      Re: SanDisk USB stick problem David Wright <deblis@lionunicorn.co.uk> - 2020-12-08 22:20 +0100
        Re: SanDisk USB stick problem Stefan Monnier <monnier@iro.umontreal.ca> - 2020-12-08 22:30 +0100
          Re: SanDisk USB stick problem Joe <joe@jretrading.com> - 2020-12-08 23:10 +0100
            Re: SanDisk USB stick problem Stefan Monnier <monnier@iro.umontreal.ca> - 2020-12-09 00:00 +0100
              Re: SanDisk USB stick problem David Wright <deblis@lionunicorn.co.uk> - 2020-12-09 00:40 +0100
          Re: SanDisk USB stick problem deloptes <deloptes@gmail.com> - 2020-12-08 23:20 +0100
            Re: SanDisk USB stick problem "James H. H. Lampert" <jamesl@touchtonecorp.com> - 2020-12-08 23:30 +0100
              Re: SanDisk USB stick problem deloptes <deloptes@gmail.com> - 2020-12-09 09:10 +0100
            Re: SanDisk USB stick problem <tomas@tuxteam.de> - 2020-12-09 10:00 +0100
              Re: SanDisk USB stick problem "Thomas Schmitt" <scdbackup@gmx.net> - 2020-12-09 10:20 +0100
                Re: SanDisk USB stick problem <tomas@tuxteam.de> - 2020-12-09 12:20 +0100
                Re: SanDisk USB stick problem Nicholas Geovanis <nickgeovanis@gmail.com> - 2020-12-09 22:20 +0100
                Re: SanDisk USB stick problem <tomas@tuxteam.de> - 2020-12-09 22:30 +0100
                Re: SanDisk USB stick problem Nicholas Geovanis <nickgeovanis@gmail.com> - 2020-12-09 22:40 +0100
                Re: SanDisk USB stick problem <tomas@tuxteam.de> - 2020-12-09 23:20 +0100
          Re: SanDisk USB stick problem Tixy <tixy@yxit.co.uk> - 2020-12-08 23:50 +0100
          Re: SanDisk USB stick problem Fred <fred@blakemfg.com> - 2020-12-09 02:10 +0100
            Re: SanDisk USB stick problem Pankaj Jangid <pankaj@codeisgreat.org> - 2020-12-09 10:20 +0100
    Re: SanDisk USB stick problem Mike McClain <mike.junk.46@att.net> - 2020-12-09 02:10 +0100
  Re: SanDisk USB stick problem Henning Follmann <hfollmann@itcfollmann.com> - 2020-12-08 17:00 +0100
    Re: SanDisk USB stick problem Greg Wooledge <wooledg@eeg.ccf.org> - 2020-12-08 17:00 +0100
  Re: SanDisk USB stick problem David Christensen <dpchrist@holgerdanske.com> - 2020-12-09 05:40 +0100
    Re: SanDisk USB stick problem Andrei POPESCU <andreimpopescu@gmail.com> - 2020-12-09 11:30 +0100
    Re: SanDisk USB stick problem Celejar <celejar@gmail.com> - 2020-12-09 19:40 +0100
      Re: SanDisk USB stick problem Joe <joe@jretrading.com> - 2020-12-09 20:20 +0100
        Re: SanDisk USB stick problem Celejar <celejar@gmail.com> - 2020-12-09 21:30 +0100
          Re: SanDisk USB stick problem Joe <joe@jretrading.com> - 2020-12-09 21:40 +0100
            Re: SanDisk USB stick problem Tixy <tixy@yxit.co.uk> - 2020-12-10 09:30 +0100
              Re: SanDisk USB stick problem Joe <joe@jretrading.com> - 2020-12-10 09:40 +0100
                Re: SanDisk USB stick problem Tixy <tixy@yxit.co.uk> - 2020-12-10 10:00 +0100
                Re: SanDisk USB stick problem Tixy <tixy@yxit.co.uk> - 2020-12-10 10:10 +0100
                Re: SanDisk USB stick problem <tomas@tuxteam.de> - 2020-12-10 11:00 +0100
                Re: SanDisk USB stick problem Tixy <tixy@yxit.co.uk> - 2020-12-10 11:20 +0100
                Re: SanDisk USB stick problem <tomas@tuxteam.de> - 2020-12-10 14:20 +0100
                Re: SanDisk USB stick problem Stefan Monnier <monnier@iro.umontreal.ca> - 2020-12-10 20:10 +0100
                Re: SanDisk USB stick problem David <bouncingcats@gmail.com> - 2020-12-10 10:20 +0100
                Re: SanDisk USB stick problem Greg Wooledge <wooledg@eeg.ccf.org> - 2020-12-10 13:50 +0100
          Re: SanDisk USB stick problem Andrei POPESCU <andreimpopescu@gmail.com> - 2020-12-10 09:20 +0100
            Re: SanDisk USB stick problem Celejar <celejar@gmail.com> - 2020-12-10 18:40 +0100
            Re: SanDisk USB stick problem Michael Stone <mstone@debian.org> - 2020-12-10 20:10 +0100
        Re: SanDisk USB stick problem Andrei POPESCU <andreimpopescu@gmail.com> - 2020-12-10 09:20 +0100
    Re: SanDisk USB stick problem [solved] Fred <fred@blakemfg.com> - 2020-12-09 20:30 +0100
      Re: SanDisk USB stick problem [solved] Joe <joe@jretrading.com> - 2020-12-09 20:50 +0100
        Re: SanDisk USB stick problem [solved] Greg Wooledge <wooledg@eeg.ccf.org> - 2020-12-09 21:30 +0100
        Re: SanDisk USB stick problem [solved] Andrei POPESCU <andreimpopescu@gmail.com> - 2020-12-10 10:10 +0100

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