On Tue, Jun 08, 2010 at 15:55:25 -0500, "Dale J. Chatham" <dale at chatham.org> wrote: > Me, too! > > How about the j option? When extracting tar figures out whether or not compression is used and what type of compression. So you don't need to use the z or j options when extracting. When creating an archive, you do. I don't know about updates.