[PLUG] Finding a /etc/group entry containing a user list

[JP Vossen <jp@jpsdomain.org>]

I have a list of 10 users and I'd like to see if there is an entry in 
/etc/group that already contains all or most of them.  Unfortunately, 
the /etc/group file is large, not well maintained, and not sorted in any 
way at all.  If there is not a group that contains all the users, I'd 
like a list of the groups that contain the most because I may be able to 
just add the missing ones.

I thought of chaining a bunch of greps together, but that's ugly, not 
scalable, and won't give me a list of partial matches.

I know I could write some Perl (or whatever) code to do this, but does 
anyone have a better trick?

Thanks,
JP
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