Ietrio6,932 reviews24 followersFollowFollowMay 22, 2021A scam book. There is no Unix, although the author might make you believe there is such a thing.And there is too much fluff: the history part is way better told in the related Wikipedia articles.Finally, this is the very basic of the subject, as things have changed quite a lot in the last decade even when it comes to the command line.junk