RE: Max UID's on RHEL 3

Thanks for the reply, I see what you mean in saying that it might have
been like that. Which is what prompted my question because I wasn't
sure if it had changed now.

Anyone else have any input?

Vince

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx
[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Wayne Pinette
Sent: Tuesday, July 04, 2006 2:23 PM
To: redhat-list@xxxxxxxxxx; Esquivel, Vicente
Subject: RE: Max UID's on RHEL 3

The following is nothing more than a guess and speculation :

<speculation type="mine">

It may be a throw back to the days when an int was 16 bit and
userid's were an unsigned int in the kernel (65535 being your
largest uid). I seem to recall an annoyance/bug in the NeXT
OS in which the userid was defined as a signed int so the max
uid was 32767, and nfs'ing between NeXT and Sun could be
problematic if you had a userid of 44569, but I digress.

If this is in fact nothing more than a throw back, and uid in
the linux kernel is now a long or unsigned long, then you
will be able to have userid's up to 2^31 -1 or 2^32 -1. Im
too lazy to look, maybe someone else knows.

</speculation>

Other than that, I have no idea :-).

Wayner


Esquivelv@xxxxxxx 07/04/06 12:13 pm >>>
I think I might have found the answer on my own, I tested my
RHEL 3 server and I was able to increase the UID_MAX to
almost any number I wanted and I was able to create accounts.
The server kept on automatically assigning UID's to the
accounts and I was able to login with the accounts just fine.
I got all the way up to like 12345678901 as a uid and it
allowed me to assign it.

Anyone have any input on this at all good or bad about huge
amounts of accounts on a server?

Thanks all

Vince

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx
[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Esquivel,
Vicente
Sent: Monday, July 03, 2006 10:57 PM
To: General Red Hat Linux discussion list
Subject: Max UID's on RHEL 3

Hello all,

Is it possible to have more then 60,000 UID's(user
accounts) assigned
on a RHEL ES 3.0 system? The systems by default has a UID_MAX of
60,000 in the login.defs file. Is it possible to have
more, if so how
many is the true max? What changes would I have to make to
the system
to accept more? I hope someone can help as this is
something we have
run into and need to try to fix promptly. Any advice on
this would be
greatly appreciated.

Thanks all in advance

Vince
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