Classic Shell Scripting - Arnold Robbins [257]
Nelson Beebe is a long time Unix user and system administrator, and has helped for years on Usenet newsgroups.
Colophon
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 Classic Shell Scripting is the knobby geometric or African tent tortoise (Psammobates tentorius). The genus Psammobates literally means "sand-loving," so it isn't surprising that the tent tortoise is found only in the steppes and outer desert zones of southern Africa. All species in this genus are small, ranging in size from five to ten inches, and have yellow radiating marks on their carapace. The tent tortoise is particularly striking, with arched scutes that look like tents.
Tortoises are known for their long lifespan, and turtles and tortoises are also among the most ancient animal species alive today. They existed in the era of dinosaurs some 200 million years ago. All tortoises are temperature dependent, which means they eat only when the temperature is not too extreme. During hot summer and cold winter days, tortoises go into a torpor and stop feeding altogether. In the spring, the tent tortoise's diet consists of succulent, fibrous plants and grasses.
In captivity, this species may hibernate from June to September, and will sometimes dig itself into a burrow and remain there for quite a long time. All "sand-loving" tortoises are very difficult to maintain in captivity. They are highly susceptible to shell disease and respiratory problems brought on by cold or damp environments, so their enclosures must be extremely sunny and dry. The popularity of these species among tortoise enthusiasts and commercial traders, along with the continued destruction of their natural habitat, has made the African tent tortoise among the top twenty-five most endangered tortoises in the world.
Adam Witwer was the production editor and Audrey Doyle was the copyeditor for Classic Shell Scripting. Ann Schirmer proofread the text. Colleen Gorman and Claire Cloutier provided quality control. Angela Howard wrote the index.
Emma Colby designed the cover of this book, based on a series design by Edie Freedman. The cover image is a 19th-century engraving from the Dover Pictorial Archive. 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 Lydia Onofrei.
The online edition of this book was created by the Digital Books production group (John Chodacki, Ken Douglass, and Ellie Cutler) using a set of Frame-to-XML conversion and cleanup tools written and maintained by Erik Ray, Benn Salter, John Chodacki, Ellie Cutler, and Jeff Liggett.