niutil -create / /groups/group_name
When I do this step from Terminal within an administrator account, I get "could not create directory [group name]. Permission denied."
What's weird is that within NetInfo Manager, I can create a directory within the groups area (of course, this is insufficient, as I don't know what the contained property/value fields should be. I thought about duplicating another group and editing, but I'm guessing I need some unique values that I can't suss out).
I thought that maybe I needed to enable root and sudo root from the command line first, but it keeps giving me a wrong password message (even though it's not).
Any more tips? I'd really like to create a folder with full access for my wife and myself, but one my kid can't access. Is the only way to do this to create a group containing a subset of local users?
Mac OS X (10.4.6) using permissions for this volume