Mac OS X for Unix Geeks (Leopard): Demistifying the Geekier Side of Mac OS X - Ernest E. Rothman, Brian Jepson, Rich Rosen - Google Books

https://books.google.de/books?id=S_OSYVXMAYUC&pg=PA69

If you're a developer or system administrator lured to Mac OS X because of its Unix roots, you'll quickly discover that performing Unix tasks on a Mac is different than what you're accustomed to. Mac OS X for Unix Geeks serves as a bridge between Apple's…