Heinlein fans will recognize the word grok as the Martian word for "to be one with" or "thorough understanding." Indeed, you will sometimes feel like a stranger in a strange land when learning Unix. As any Unix guru can attest, however, the rewards far outweigh the initial learning curve.
This final chapter is a hodgepodge of useful and sometimes amusing tidbits. A sure sign you're on the right road to grokking BSD is when you're able to see both the usefulness and the quirky humor that is inherent in all Unix systems.