topic Group ID (GID) in Operating System - HP-UX

Group ID (GID)

André Lima — Thu, 20 Mar 2008 02:37:29 GMT

Hi i've a doubt if i can create two groups tham same name bur diferents gid?

Ex: informix gid 100
informix gi 102

Because i have one server has installed with windows 2003 r2 and i active nfs service.

And i have two hpux servers, in first had a group informix gid 102 in another server had a group informix gid 100, but in microsoft windows only identify one gid.

Please help me!!!

Re: Group ID (GID)

Michael Steele_2 — Thu, 20 Mar 2008 03:53:43 GMT

Why don't you move all the user's in 102 over to 100?

What you're asking to do is a basic violation.

Re: Group ID (GID)

André Lima — Thu, 20 Mar 2008 04:01:15 GMT

Because the informix has installed in gid 100.

Can i have two groups with same name tham gid diferents?

Ex:

group gid
informix 100
informix 102

Re: Group ID (GID)

Dennis Handly — Thu, 20 Mar 2008 06:53:13 GMT

>Because the informix has installed in gid 100.

What's the difference between the 100 and the 102? Just move one to the other.

>Can i have two groups with same name them gid different?

I don't see how. Who are you trying to fool? HP-UX or windows?

On HP-UX, it is the GID that is used, not the name, which is only used for displaying.
If your interface with windows is by the name, then the mapping from name to GID would probably pick the first number, 100.

So the safest is to fix one of your machines to match the other.

Re: Group ID (GID)

André Lima — Thu, 20 Mar 2008 13:29:06 GMT

Yes this is my problem, because i have informix databse software installed with gid 102 in production server tham the the test server with gid 100.

It's possible put one inside in other, sorry because my knowloge for hpux is basic.

Re: Group ID (GID)

Michael Steele_2 — Thu, 20 Mar 2008 14:03:25 GMT

Here's a entry from /etc/passwd:

arushkin:Igljf78DS:142:102:Amy Rushkin:/usr/people/arushkin:/bin/csh
billybob:reljf78DS:132:100:Amy Rushkin:/usr/people/billybob:/bin/csh

a) grep 102 /etc/passwd

(* this will give you a list of all users with gid of 102 and maybe a little more. The gid is the 4 parameter. See above example. Only arushkin should be returned *)

b) vipw (* this will open /etc/passwd with the vi editor *)

c) change 102 to 100 for arushkin.

Do you need help with the 'vi' editor?

Re: Group ID (GID)

Dennis Handly — Thu, 20 Mar 2008 18:54:58 GMT

>Michael: b) vipw c) change 102 to 100 for arushkin.

Besides changing /etc/passwd and /etc/group, you need to hunt down and change all of the files with the wrong GID.

You can use find and chgrp to fix these:
# find / other-file-systems -group 102 -exec chgrp informix {} +

(This would be done after /etc/group changed.)

Re: Group ID (GID)

Michael Steele_2 — Thu, 20 Mar 2008 20:15:52 GMT

Oops. Thanks!