On 08/31/2010 12:38 PM, Lloyd Brown wrote: > FYI, a good example of needing ACLs would be a situation in which you > want different permissions for different groups of people. For example > in the College of Engineering system (CAEDM), they at least used to > allow user-created groups, and automatically have a "read-only" group > associated with it. The "read-only" group is a separate GID, and access > is based on ACLs. I don't know how to do this beyond using ACLs. > This is still the case, but slightly improved. With the newer NFS servers and clients, ACLs can now be listed and changed over NFS; so if you have a CAEDM account you can get a look at how ACLs can be used.
If you have an NFS client that doesn't understand Posix ACLs, a chmod to a file will wipe out it's ACLs on the server. Otherwise, ACLs work even with older NFS clients and servers. There are a few things Posix ACLs can't do that someday may be possible with NFS4 ACLs. Someday because filesystem has to support NFS4 ACLs. I'm only aware of ZFS on Solaris having implemented this. GFS might support it, but ext3, ext4, and XFS don't yet. I don't think it's supported in the local file utilities either (ls, chmod, etc). ;-Daniel Fussell -------------------- BYU Unix Users Group http://uug.byu.edu/ The opinions expressed in this message are the responsibility of their author. They are not endorsed by BYU, the BYU CS Department or BYU-UUG. ___________________________________________________________________ List Info (unsubscribe here): http://uug.byu.edu/mailman/listinfo/uug-list
