Daniel J. Barrett has been teaching and writing about Linux and related technologies for more than 30 years. He is an author of numerous O'Reilly books such as Efficient Linux at the Command Line, Linux Security Cookbook, SSH, The Secure Shell: The Definitive Guide, Macintosh Terminal Pocket Guide, and MediaWiki. Dan has also been a software engineer, heavy metal singer, system administrator, university lecturer, web designer, and humorist. He works at Google. Visit DanielJBarrett.com to learn more.
