RE: Max UID's on RHEL 3

The official word I received from Red Hat was that the max for UID's is
2.1 billion as of RHEL 2. They did add that there are only a few
applications out there that will only accept UID's up to 1 million.

Vince

-----Original Message-----
From: redhat-list-bounces@xxxxxxxxxx
[mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Esquivel, Vicente
Sent: Wednesday, July 05, 2006 8:38 AM
To: General Red Hat Linux discussion list
Subject: 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
--
redhat-list mailing list
unsubscribe
mailto:redhat-list-request@xxxxxxxxxx?subject=subscribe
https://www.redhat.com/mailman/listinfo/redhat-list


--
redhat-list mailing list
unsubscribe
mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list

--
redhat-list mailing list
unsubscribe
mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list


--
redhat-list mailing list
unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list


--
redhat-list mailing list
unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list

Relevant Pages

  • RE: Reg : RHEL 5.0 Installatio
    ... Subject: Reg: RHEL 5.0 Installatio ... CAUTION: This e-mail and any attachmentcontain information ...
    (RedHat)
  • RE: Reg : RHEL 5.0 Installatio
    ... To subscribe or unsubscribe via the World Wide Web, ... Subject: Reg: RHEL 5.0 Installatio ... Ping from yourself to yourself; ping localhost, ...
    (RedHat)
  • Re: Password Problem in RH Linux ES
    ... Users should know that they are not allowed to change accounts. ... People who are not sysadmins should generally not have root. ... installations may generate necessary usernames for local software ... and other RHEL users: ...
    (comp.os.linux.security)
  • Re: Should I Abandon Mutt and Exim4?
    ... such as having three accounts with the same ... > procmail, I think, but it's easier to do it with three ... I didn't know that it was possible to share a UID. ... To UNSUBSCRIBE, email to debian-user-REQUEST@xxxxxxxxxxxxxxxx ...
    (Debian-User)
  • RE: Max UIDs on RHEL 3
    ... 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. ... automatically assigning UID's to the accounts and I was able to login ...
    (RedHat)