[CentOS] directory permissions
heinlein at madboa.com
Tue Jan 12 21:58:48 UTC 2010
On Tue, 12 Jan 2010, Carlos Santana wrote:
> 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/
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