Announcing the release of Fedora 16 Beta!!

Stephen Gallagher sgallagh at
Tue Oct 4 15:50:18 UTC 2011

On Tue, 2011-10-04 at 16:55 +0200, suvayu ali wrote:
> Hi,
> On Tue, Oct 4, 2011 at 4:44 PM, Dennis Gilmore <dennis at> wrote:
> >    * System Accounts. Fedora now standardizes on login.defs as
> > authority for UID/GID space allocation, and has moved boundary between
> > system and user accounts from 500 to 1000 to match conventions
> > followed by several other Linux distributions. Upgrading from a
> > existing release will not be affected by this change and you can use
> > kickstart to override this change during installation if necessary.
> >
> When one preupgrades to F16 do the old 500+ user ids get converted to
> 1000+, or is it expected the user will do this manually? In any case I
> would be interested in knowing how to do this manually.

No user IDs should EVER be altered automatically. This is unsafe,
because it would change file access on the disk (and potentially result
in a system that was inaccessible).

You probably don't want to change this yourself either, but if you
REALLY want to change IDs, you would need to use /usr/sbin/usermod to
change the user's ID, then you would want to run a complicated 'find'
command starting at the root of the filesystem to search for any file
owned by the old UID and chown it. Then you'd have to repeat this for
every user and every group. And then if you have data stored on
removable disks or network shares, you need to handle those too...

DO NOT DO THIS! It's only going to cause you problems.
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