Appendix. Colophon

About the Author Daniel J. Barrett, Ph.D., has been immersed in Internet technology since 1985. Currently working as a software engineer, Dan has also been a heavy metal singer, Unixsystem administrator, university lecturer, web designer, and humorist. He is the author of O'Reilly's Linux Pocket Guide, and is the coauthor of Linux Security Cookbook and the first edition of SSH, The Secure Shell: The Definitive Guide. He also writes monthly columns for Compute! and Keyboard Magazine, as well as articles for the O'Reilly Network.

Richard E. Silverman has a B.A. in computer science and an M.A. in pure mathematics. Richard has worked in the fields of networking, formal methods in software development, public-key infrastructure, routing security, and Unixsystems administration. He coauthored the first edition of SSH, The Secure Shell: The Definitive Guide, and he loves to read, study languages and mathematics, sing, dance, and exercise.