Beginning Shell Scripting, Wrox Press

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Beginning Shell Scripting
Eric Foster-Johnson, John C. Welch, and Micah Anderson
Beginning Shell Scripting
Published by
Wiley Publishing, Inc.
10475 Crosspoint Boulevard
Indianapolis, IN 46256
www.wiley.com
Copyright © 2005 by Wiley Publishing, Inc., Indianapolis, Indiana
Published simultaneously in Canada
ISBN-13: 978-0-7645-8320-9
ISBN-10: 0-7645-8320-4
Manufactured in the United States of America
10 9 8 7 6 5 4 3 2 1
1MA/QW/QU/QV/IN
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Library of Congress Cataloging-in-Publication Data
Foster-Johnson, Eric.
Beginning shell scripting / Eric Foster-Johnson, John C. Welch, and Micah Anderson.
p. cm.
Includes index.
ISBN-13: 978-0-7645-8320-9
ISBN-10: 0-7645-8320-4 (paper/website)
1. Operating systems (Computers) I. Welch, John C., 1967– II. Anderson, Micah, 1974– III. Title.
QA76.76.O63F59717 2005
005.4' 3—dc22
2005002075
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trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates, in the United States and other countries,
and may not be used without written permission. All other trademarks are the property of their respective owners. Wiley
Publishing, Inc., is not associated with any product or vendor mentioned in this book.
About the Authors
Eric Foster-Johnson
(Arden Hills, MN) is a veteran programmer who works daily with Linux, Unix,
Windows, Mac OS X, and other operating systems. By day, he writes enterprise Java software for
ObjectPartners, a Minnesota consulting firm. He has authored a number of Linux and Unix titles includ-
ing
Red Hat RPM Guide
,
Teach Yourself Linux
,
Teach Yourself Unix,
and
Perl Modules
.
To Katya and Nalana.
John C. Welch
(Boston, MA) has more than ten years of Mac experience in the trenches of the IT world.
He packs the hall at Macworld Expo where he’s a regular speaker, sharing his experiences and knowl-
edge on using Macs effectively in business and enterprise IT environments. John’s articles are frequently
featured in
MacTech Magazine
and
WorkingMac.com
, and he is semi-regularly featured on
The Mac Show
conducting interviews with the geekier side of the Mac community. He’s recently been touring the coun-
try presenting seminars on Mac OS X administration to IT professionals from coast to coast.
First and foremost, this is dedicated to my son, Alex, who is always the angel on my shoulder.
As an only child, I’ve “adopted” my own family over the years to make up for the one I didn’t grow up
with, so in no particular order: Adrian, Jenny, Melissa, Sly, Web, Karen, Skip, Gypsye, Schoun, Harv,
Jessica, the MacTech Crew, Sam, Steve, Shawn, Hilary, the YML list, the list that is never named, and
too many others who help me out in myriad ways.
Oh, and to Randy Milholland, whose work has kept me sane in this very odd world.
Micah Anderson
has been a Unix system administrator for more than a decade. He is a Debian
GNU/Linux developer and works as an independent consultant building alternative communication
infrastructure and supporting the technology needs of positive grassroots alternatives.
This is dedicated to my parents, who got me started hacking on the Timex Sinclair and have always sup-
ported me, no matter what I do. This is also dedicated to those around the world who have struggled for
horizontal self-determination in the face of oppression: those who inspire people to dream of a better
world by doing something about it. Slow and steady wins the race.
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