[K12OSN] Permissions for students and teachers

[Tim Born]

POSIX ACLs (Access Control Lists) deal with access controls at a much 
finer level of granularity.
For the (rare) situation you describe, that's what I reach for. 

man acl

-tim

Almquist Burke wrote:

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> It's been my experience that the only real limitations with UNIX  
> permissions is when you want to have one group to have read-write  
> access, one group to have read only access, and everyone else not to  
> have any access at all. This is the only thing you really can't do in  
> UNIX. The good news is that this scenario isn't terribly very common  
> if you really think about it. -----BEGIN PGP SIGNATURE-----
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