>>>>> "wbennett" == wbennett  <[email protected]> writes:

wbennett> I've been given a small thumbdrive.  I can copy a file to
wbennett> the drive. The drive changes the file's permissions and will
wbennett> not allow them to be altered:

Sounds like you have a DOS file system on there -- it doesn't \
obey UNIX file permissions.  You can reformat the drive as,
say, ext2, but this will make the resulting filesystem unusable on any
platform other than linux.

To try this, do
   mkfs -t ext2 /dev/sdb1 (or whatever the name of the drive is).
Not while the drive is mounted!
--
Dr Peter Chubb                                  peter DOT chubb AT nicta.com.au
http://www.ertos.nicta.com.au               ERTOS within National ICT Australia
All things shall perish from under the sky/Music alone shall live, never to die
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