Group questions.

**kyoji** · September 30th, 2010

Hi, I have just started to learn more about group management, and come across some things that have me stumped.

First, I am unable to get group passwords to work at all in 10.4. I set the password for the group and try to `newgrp` in to it, the prompt asks for the password, but always gives me permission denied (even though its set to allow this.."\: x \:"). Is this just not fully supported?

Next, after using `sudo gpasswd -A usr grp`, the user becomes an admin of the group, he can add/remove users only for that grp, but is not a "member". How would I find out who are admins of groups? I have tried `groups`, looking in /etc/group and theres nothing, the user does't even look like hes associated with the group at all.

I hope some one can clear this mystery up for me.

**sisco311** · September 30th, 2010

Originally Posted by kyoji

Hi, I have just started to learn more about group management, and come across some things that have me stumped.

First, I am unable to get group passwords to work at all in 10.4. I set the password for the group and try to `newgrp` in to it, the prompt asks for the password, but always gives me permission denied (even though its set to allow this.."\: x \:"). Is this just not fully supported?

It's a known BUG, fixed in shadow SVN.

From http://svn.debian.org/wsvn/pkg-shado...eam/trunk/NEWS

Code:

$Id: NEWS 3279 2010-08-29 19:02:41Z nekral-guest $

shadow-4.1.4.2 -> shadow-4.1.5                                  UNRELEASED

...
- newgrp, sg, groupmems
  * Fix parsing of gshadow entries.
...

EDIT:
Upstream BUG report:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=569899

Originally Posted by kyoji

Next, after using `sudo gpasswd -A usr grp`, the user becomes an admin of the group, he can add/remove users only for that grp, but is not a "member". How would I find out who are admins of groups? I have tried `groups`, looking in /etc/group and theres nothing, the user does't even look like hes associated with the group at all.

I hope some one can clear this mystery up for me.

The third field in the /etc/gshadow file contains the coma-separated list of administrators.

See:

Code: