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Re: Only root can write on USB disk

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On Fri, May 05, 2017 at 09:17:51AM +0000, Curt wrote:
> On 2017-05-02, Greg Wooledge <wooledg@eeg.ccf.org> wrote:
> > On Tue, May 02, 2017 at 07:16:57PM +0430, Mostafa Shahverdy wrote:
> >> I have a very annoying problem. I can't write to my usb drives (fat32,
> >> ntfs, etc.) without root permissions. How can I fix this?
> >
> > Mount the file system with "-o uid=youruser" to have the files presented
> > by the kernel as being "owned" by that user.
> >
> >
> I don't understand that advice entirely.
> Isn't there a difference between mounting the device as a regular user
> and writing to the device as a regular user (which you might be
> prevented from doing if the filesystem had root-only write permissions,
> thus Brian's ls -l suggestion to eliminate that possibility)?

There is a difference. The "-o=foo" advice is betting on the file system
being one without ownership info (i.e. a lower life form ;-)

Once mounted, the operating system just "assumes" some ownership and
permission info. The "user=" and "group=" options give you some say
in it.

The option "user" on the fstab just allows a regular user to activate
a mount according to said entry (however perms & ownership of the "end
result" might look like).

The two things are (somewhat) orthogonal (if I understood your question

- -- t
Version: GnuPG v1.4.12 (GNU/Linux)


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