user-group relationship problem

Corinna Vinschen
Mon May 21 11:06:00 GMT 2012

On May 15 10:33, Fedin Pavel wrote:
>  Looks like i've figured out why NFS sometimes becomes unresponsive.
> This can be uid/gid problem.
>  I have a local used named 'nfsd' to run the server. Here is its
> line from what mkpasswd -l reports. Note its GID=513.
> nfsd:unused:1010:513:nfsd,U-fedinw7x64\nfsd,S-1-5-21-2187549510-2720235518-4109675292-1010:/home/nfsd:/bin/bash
>  I have created this user as a member of 'Administrators' group.
> However look at mkgroup -l output:
> Administrators:S-1-5-32-544:544:
> None:S-1-5-21-2187549510-2720235518-4109675292-513:513:
> So where has this 'none' came from? I even don't have it in my

"None" is a default builtin group in the local SAM of all Windows NT
versions since the beginnings.  All local user accounts, including the
admin account, have their primary group set to "None".  This is a fixed
setting which cannot be changed.  Primary group membership can only be
changed for domain accounts.

The name "None" is actually localized, it's only "None" for the english
Windows versions.  It has always the SID combined of the computer SID
with an attached RID of 513.


Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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