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From Dmitri Chebotarov <>
Subject Re: useradd
Date Wed, 29 Aug 2012 19:02:07 GMT
Hi Yannick  

I have had the same issue with Linux images and did the same - removed -u option from useradd
command in
Everything works fine without this option.  

I think having the same user id would be important if you need to match userid across multiple
Linux system (ie. using NFS mounted volumes, etc.).  
But for a single Linux reservation it's OK to let system choose user id.

Another option would be to increment userid by 500 for userid less then 500. This is if you
need to have the same user id across multiple systems.


Dmitri Chebotarov
Virtual Computing Lab Systems Engineer, TSD - Ent Servers & Messaging
223 Aquia Building, Ffx, MSN: 1B5
Phone: (703) 993-6175
Fax: (703) 993-3404

On Wednesday, August 29, 2012 at 14:53 , Yannick Charbonneau wrote:

> Hi All,
> We encountered an issue with Linux Images, users could NOT connect to machines.
> I found in the vcld.log;
> “useradd: UID 4 is not unique” my image already had a UID 4.
> I removed “-u $user_uid” from $useradd_string and it appears to have “fixed”
the problem.
> What did I break by doing this? What is the proper way to fix this? Remove all account
except root from the image?
> Thanks
> Yanik

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