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

[David Coulson <david@davidcoulson.net>]

On 11/12/11 2:38 PM, JP Vossen wrote:
> Since this is a Linux system, the primary group is the same as the 
> user name, so that's no help.
Not sure I understand that connection - Your system creates a group with 
the same name of the user and sets the gid of the new user to that 
group? My RedHat systems seem to create users with gid 500 (users)
> I'd forgotten about the 'id' command, thanks for the reminder.  But 
> I'm not sure I see how that helps me; it seems like I'd still need to 
> parse stuff into some kind of data structure so I can get my answer.
>
> Maybe I need an example.
>
> If I have user01 to user10 (decimal, not binary :), and group01 to 
> group40, I want to know that, say, group15 contains 8 out of 10 of my 
> users, so if I can add user09 and user10 to group15, everyone will 
> have the right perms once I chgrp the dir tree.
Pretty sure if you just do 'usermod -aG group1,group2,blahblah username' 
it'll add the user to any group they are currently not a member. No need 
to figure out who is not a member of the group.

David
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