On Tue, 12 Jan 2010, Carlos Santana wrote: > Hi, > > I have changed directory ownership permissions recursively such that > it is owned by username:groupname , where groupname is not the > default group, i.e., username. However, when a user creates a new > file the default permissions are again username:username. > > How can I give ownership permissions on a particular directory so > that any files created in that directory will always have specifc > username:groupname permissions? chmod 2775 /your/directory This will assign group ownership of any files created in /your/directory to the group that owns that directory. It won't, however, change user ownership. Allowing that sort of operation would be a great avenue for a denial-of-service attach on any filesystem with quotas. > Also is there any option that would allow only owner to delete > files, even though group has rwx permissions? chmod 3775 /your/directory This combines the 2775 trick mentioned above with an o+s operation. Setting the "sticky bit" on the all-users permissions allows only owners to dispose of files. See the permissions on /tmp or /var/tmp for an example. -- Paul Heinlein <> heinlein at madboa.com <> http://www.madboa.com/