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.
Robert G. Byrnes, Ph.D., has been hacking on Unix systems for 20 years, and has been involved with security issues since the original Internet worm was launched from Cornell University, while he was a graduate student and system administrator. Currently, he’s a software engineer at Curl Corporation. He has worked in the fields of networking, telecommunications, distributed computing, financial technology, and condensed matter physics.
Our look is the result of reader comments, our own experimentation, and feedback from distribution channels. Distinctive covers complement our distinctive approach to technical topics, breathing personality and life into potentially dry subjects.
The animal on the cover of SSH, the Secure Shell: The Definitive Guide is a land snail (Mollusca gastropoda).
A member of the mollusk family, a snail has a soft, moist body that is protected by a hard shell, into which it can retreat when in danger or when in arid or bright conditions. Snails prefer wet weather and, though not nocturnal, will stay out of bright sun. At the front of a snail’s long body are two sets of tentacles: its eyes are at the end of one set, and the other set is used for smelling and navigation.
Land snails are hermaphrodites, each having both female and male sex organs, though a snail must mate with another snail in order for fertilization to occur. A snail lays eggs approximately six times a year, with almost 100 eggs each time. Young snails hatch in a month and become adults in two years. A snail’s life span is approximately 5–10 years.
Known as a slow mover, a snail moves by muscles on its underside that contract and expand, propelling the snail along at a slow pace. It leaves a wet trail of mucus, which protects the snail from anything sharp it may need to crawl over as it searches for food. The snail’s diet of plants, bark, and fruits causes it to be a pest in many parts of the world where it is notorious for destroying crops.
Mary Brady was the production editor for SSH, the Secure Shell: The Definitive Guide. Audrey Doyle proofread the book. Marlowe Shaeffer and Mary Anne Weeks Mayo provided quality control. Lydia Onofrei provided production assistance. John Bickelhaupt wrote the index.
Ellie Volckhausen designed the cover of this book, based on a series design by Edie Freedman. The cover image is an original engraving from the book Natural History of Animals by Sanborn Tenney and Abby A. Tenney, published by Scribner, Armstrong & Co. in 1873. Karen Montgomery produced the cover layout with Adobe InDesign CS using Adobe’s ITC Garamond font.
David Futato designed the interior layout. This book was converted by Keith Fahlgren to FrameMaker 5.5.6 with a format conversion tool created by Erik Ray, Jason McIntosh, Neil Walls, and Mike Sierra that uses Perl and XML technologies. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont’s TheSans Mono Condensed. The illustrations that appear in the book were produced by Robert Romano, Jessamyn Read, and Lesley Borash using Macromedia FreeHand MX and Adobe Photoshop CS. The tip and warning icons were drawn by Christopher Bing. This colophon was written by Nicole Arigo.