Bash-Beginners-Guide

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3. New versions, translations and availability The most recent edition can be found at http://tille.garrels.be/training/bash/. You should find the same version at http://tldp.org/LDP/Bash-Beginners-Guide/html/index.html. This guide is available in print from Fultus.com. Bash Guide for Beginners Figure 1. Bash Guide for Beginners front cover This guide has been translated: • Chinese translation at http://xiaowang.net/bgb-cn/, by Wang Wei. • Ukrainian translation at http://docs.linux.org.ua/index.php/LDP:Bash_beginners_guide, by Yaroslav Fedevych and his team. A french translation is in the making and will be linked to as soon as it is finished. 4. Revision History Revision History Revision 1.11 2008-12-27 Revised by: MG Processed input from readers. Revision 1.10 2008-06-06 Revised by: MG address change Revision 1.9 2006-10-10 Revised by: MG Incorporated reader remarks, added index using DocBook tags. Revision 1.8 2006-03-15 Revised by: MG clarified example in Chap4, corrected here doc in chap9, general checks and correction of typos, added link to Chinese and Ukrainian translation, note and stuff to know about awk in chap6. Revision 1.7 2005-09-05 Revised by: MG Corrected typos in chapter 3, 6 and 7, incorporated user remarks, added a note in chap7. Introduction 2
Revision 1.6 2005-03-01 Revised by: MG Minor debugging, added more keywords, info about new Bash 3.0, took out blank image. Revision 1.0 2004-04-27 Revised by: TM Initial release for LDP; more exercises, more markup, less errors and abuse; added glossary. Revision 1.0-beta 2003-04-20 Revised by: MG Pre-release 5. Contributions Thanks to all the friends who helped (or tried to) and to my husband; your encouraging words made this work possible. Thanks to all the people who submitted bug reports, examples and remarks - among many, many others: • Hans Bol, one of the groupies • Mike Sim, remarks on style • Dan Richter, for array examples • Gerg Ferguson, for ideas on the title • Mendel Leo Cooper, for making room • #linux.be, for keeping my feet on the ground • Frank Wang, for his detailed remarks on all the things I did wrong ;-) Special thanks to Tabatha Marshall, who volunteered to do a complete review and spell and grammar check. We make a great team: she works when I sleep. And vice versa ;-) 6. Feedback Missing information, missing links, missing characters, remarks? Mail it to the maintainer of this document. 7. Copyright information Bash Guide for Beginners * Copyright (c) 2002-2007, Machtelt Garrels * All rights reserved. * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the author, Machtelt Garrels, nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED Introduction 3
Page 1 and 2: Bash Guide for Beginners Machtelt G
Page 3 and 4: Bash Guide for Beginners Table of C
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Page 7 and 8: Table of Contents Glossary C.......
Page 9: Introduction 1. Why this guide? The
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Page 15 and 16: Bash Guide for Beginners mia:~> cat
Page 17 and 18: Bash Guide for Beginners When invok
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Page 21 and 22: Built-in commands are necessary to
Page 23 and 24: • Brace expansion • Tilde expan
Page 25 and 26: A number of methods can be used; on
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Page 29 and 30: Chapter 2. Writing and debugging sc
Page 31 and 32: the documentation of your favorite
Page 33 and 34: Bash Guide for Beginners Comments a
Page 35 and 36: Bash Guide for Beginners + set +x I
Page 37 and 38: Chapter 3. The Bash environment In
Page 39 and 40: Bash Guide for Beginners local pid
Page 41 and 42: MOZILLA_FIVE_HOME=/usr/lib/mozilla
Page 43 and 44: Bash Guide for Beginners franky ~>
Page 45 and 46: the GNU Awk programming language is
Page 47 and 48: Bash Guide for Beginners 3.2.4. Res
Page 49 and 50: LINES MACHTYPE MAILCHECK OLDPWD OPT
Page 51 and 52: two is the second positional parame
Page 53 and 54: Bash Guide for Beginners 3.3.1. Why
Page 55 and 56: A correctly-formed brace expansion
Page 57 and 58: Bash Guide for Beginners If the sub
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Bash Guide for Beginners /dev/hda5
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Bash Guide for Beginners 3.7. Summa
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Two regular expressions may be conc
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LABEL=/ / ext3 defaults 1 1 If this
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cathy ~> ls -ld [[:digit:]]* drwxrw
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Bash Guide for Beginners p Print te
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sandy ~> sed -n '/a text/,/This/p'
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Bash Guide for Beginners # This is
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Chapter 6. The GNU awk programming
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Bash Guide for Beginners 121script.
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Bash Guide for Beginners amd.conf a
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Bash Guide for Beginners record1 re
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Bash Guide for Beginners 6.3.6. The
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Chapter 7. Conditional statements I
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Bash Guide for Beginners Table 7-2.
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Bash Guide for Beginners 7.1.2.2. N
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[root@elegance root]# We switch to
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Bash Guide for Beginners echo "Prop
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Bash Guide for Beginners We use the
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Bash Guide for Beginners case EXPRE
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Upon successful condition testing,
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Bash Guide for Beginners bit better
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8.2. Catching user input 8.2.1. Usi
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Bash Guide for Beginners michel ~/t
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Bash Guide for Beginners # DO NOT E
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File descriptor 5 Bash Guide for Be
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Bash Guide for Beginners The result
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Bash Guide for Beginners ♦ Compre
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Bash Guide for Beginners for i in `
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touch pic-`date +%s`.jpg sleep 300
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DISKFUL=$(df -h $WEBDIR | grep -v F
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;; 2) $FORTUNE startrek ;; 3) $FORT
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[carol@octarine ~/test] ls -a ./ ..
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Bash Guide for Beginners 9.7.2. Exa
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Chapter 10. More on variables In th
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Bash Guide for Beginners [bob in ~]
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if [ -z $1 ]; then echo "Usage: $0
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10.3.3. Transformations of variable
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Bash Guide for Beginners The opposi
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Chapter 11. Functions In this chapt
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The commands after && are only exec
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zip2 "$TAR" echo "...done." >> "$LO
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Chapter 12. Catching signals In thi
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Bash Guide for Beginners maud: ~> k
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Bash Guide for Beginners 2. Write a
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Bash Guide for Beginners jobs kill
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if [ $i -eq 5 ] ArrowUp+Enter or !!
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cd Change directory. cdp/cdplay An
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Bash Guide for Beginners gimp grep
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Send and receive mail. man Read man
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Bash Guide for Beginners rsh RPM Pa
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W Bash Guide for Beginners w Show w
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Index A aliases Section 3.5.1 ANSI-
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Bash Guide for Beginners Section 3.
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J Bash Guide for Beginners K kill k
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eadonly Section 10.1.3 regular expr
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Bash Guide for Beginners vi(m) Sect
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