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Re: "user with UID not found" error

From: Christopher Batten
Subject: Re: "user with UID not found" error
Date: Mon, 1 Aug 2022 16:16:50 +0000

>>> > On Jul 27, 2022, at 8:44 AM, Ricardo Wurmus <> wrote:
>>> > 
>>> > Hi Christopher,
>>> > 
>>> >> Turns out we are using SSSD not NCSD on our Linux systems. It seems to 
>>> >> be working fine:
>>> > 
>>> > You will need to run NSCD if you want Guix software to be able to talk
>>> > to the system’s SSSD.  The reason is that SSSD works by having
>>> > applications load a library whereas NSCD implements a network protocol.
>>> > Software built with Guix cannot load the system libary due to ABI
>>> > conflict, but it *can* talk to NSCD over the network.
>>> > 
>>> > The system NSCD talks to the system SSSD, so there’s no problem there.
>>> > 
>>> > -- 
>>> > Ricardo
>> On Wed, Jul 27, 2022 at 12:51 PM Christopher Batten <> 
>> wrote:
>> Hmmm ... this made me think that running both was not a great idea?
>> But I am not an expert on any of this :) I guess the key is to just make 
>> sure you only enable caching for hosts in /etc/nscd.conf?
>> Best,
>> Chris
> On Jul 28, 2022, at 9:14 PM, Chris Marusich <> wrote:
> FYI:

Thanks for everyone's help! I think I understand now: the key is if we want to 
use guix, then we really do want to run NSCD and SSSD on these RHEL/CentOS 
systems if at all possible.

So I think we just now need to follow the instructions here?

Or do you recommend a different way to run NSCD and SSSD at the same time on 
RHEL/CentOS systems? 

Once we figure this out maybe we should add a note about this in the Guix docs 

Especially if Fedora is intending to remove NSCD?


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