On Fri, 29 May 1998, Roberto Jung Drebes wrote:
drebes> On Thu, 28 May 1998, Joseph Martin wrote:
drebes>
drebes> > I am having trouble understanding aspects of file/directory permissions. I
drebes> > know how to make file readable, writeable, etc., but am having trouble
drebes> > with advanced aspects. For instance I once read that you can create a user
drebes> > called backup and use it to backup the whole disk. The idea was to give
drebes> > backup read-only access to the whole disk. How can you give a specific
drebes> > user certain permissions on files? What exactly are groups used for?
drebes>
drebes> To give permissions to a specific user, Linux should have a mechanism
drebes> called ACL - Access Control List, unfortunately it doesn't. In RH, they
drebes> try to solve the problem implementing a group name for each user, what
drebes> ends up messing the system (well, I don't like it). some other unixes has
drebes> ACLs.
drebes>
drebes> You could mount a partiton read-only, and then backup as root.
drebes>
drebes>
drebes> --
permissions can be given to even one user, without using the RH method, as
follows.
make the user as a member of group a
make all his files belong to group b
group b must have only priveleged users as members.
there u r.
we have implemented this successfully.
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