[CentOS] Centos+AD integration (uid/gid problems)

Christopher Hearn christopher.hearn at cchmc.org
Tue Mar 29 18:13:13 UTC 2011

On Mar 29, 2011, at 1:18 PM, Ray Van Dolson wrote:

> On Tue, Mar 29, 2011 at 06:07:46PM +0100, nux at li.nux.ro wrote:
>> Hi,
>> I need to have several EL machines in an AD env. 
>> Joining the machines was easier than expected using authconfig, but what 
>> happens now is that blahdomain\blahuser gets assigned a 
>> different, random ID each time I use a different station.
>> In AD I did specify the UID and GID in the UNIX Attributes tab for blahuser, 
>> but it gets totally ignored; so do the other values (for home, shell etc).
>> Ideally I'd have all the users assigned a static uid and gid from AD and 
>> have /home on all machines mounted from NFS; but right now if I log in with 
>> blahuser to another machine my $HOME is owned by another random id.
>> Sugesstions? What am I missing? I'm quite a noob with Windows :)
>> Cheers
> You might try taking a look at idmap_ad(8) (and the other idmap_* man
> pages as well).
> I'm not sure which idmap backend gets used by default (RID?).  I did
> think idmap_rid would result in consistent UID/GID mappings based on
> the SID assuming you choose the same ranges on each server...
> Ray

If you use something like Centrify Express or Likewise Open, the UID/GIDs are calculated the same way every time on every system that uses the software so it makes, IMO, setup & management a lot easier.


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