[CentOS] groupadd failure

Wed Sep 2 21:21:49 UTC 2015
Greg Lindahl <lindahl at pbm.com>

Sorry, I didn't read what you said carefully enough -- it's trying to
create a system group. Still, looking inside of /etc/group to see what
system groups already exist is probably a good idea.

On Wed, Sep 02, 2015 at 02:19:51PM -0700, Greg Lindahl wrote:
> The groupadd manpage gives this clue:
> 
>   The default is to use the smallest ID value greater than or equal to
>   GID_MIN and greater than every other group.
> 
> Maybe you have a group numbered GID_MAX or more already? 60000,
> according to the manpage.
> 
> On Wed, Sep 02, 2015 at 09:42:29PM +0100, isdtor wrote:
> > The munin rpms from EPEL failed to install correctly on a particular
> > machine. This is why
> > 
> > # /usr/sbin/groupadd -r munin
> > groupadd: Can't get unique system GID (no more available GIDs)
> > #
> > 
> > but I don't understand why this happens. Even after checking the man pages
> > for groupadd and login.defs, I have been unable to determine what the
> > settings for SYS_GID_MIN/SYS_GID_MAX on RHEL/CentOS are. None of the 5/6
> > machines I have access to list them in login.defs. Even assuming
> > relatively conservative values of 201/499, resp. (examples from other
> > distros include 101/999), this doesn't add up.
> > 
> > # grep munin /etc/group
> > # ypmatch munin group
> > # wc -l /etc/group
> > 100 /etc/group
> > # grep SYS_GID /etc/login.defs 
> > # 
> > 
> > Any ideas? Information seems to be pretty thin on the ground.
> > 
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