[cups] @group--is this a UNIX/Linux group, or is it defined in cups-files.conf?

[Bryan Mason]

On Wed, 2021-07-14 at 15:19 -0500, Johnnie W Adams wrote:
> When the documentation refers to @group in the context of cupsd.conf,
> is that an OS group, or is that defined somewhere, like cups-
> files.conf?
> 
> I think it's the latter, based on experimentation, but I could be
> wrong.

It's usually the latter (a group defined in the underlying OS).  

The documentation for "AuthType" included older versions of CUPS (like
1.6.3 still used in RHEL 7) says that authentication can be performed
using information in /etc/cups/passwd.md5, but that seems to no longer
be an option in recent versions of CUPS.

~ Bryan