Bash-Beginners-Guide

Recommendations

Info

Bash Guide for Beginners The table below gives an overview of special formatting characters: Table 6-1. Formatting characters for gawk Sequence Meaning \a Bell character \n Newline character \t Tab Quotes, dollar signs and other meta-characters should be escaped with a backslash. 6.2.3. The print command and regular expressions A regular expression can be used as a pattern by enclosing it in slashes. The regular expression is then tested against the entire text of each record. The syntax is as follows: awk 'EXPRESSION { PROGRAM }' file(s) The following example displays only local disk device information, networked file systems are not shown: kelly is in ~> df -h | awk '/dev\/hd/ { print $6 "\t: " $5 }' / : 46% /boot : 10% /opt : 84% /usr : 97% /var : 73% /.vol1 : 8% kelly is in ~> Slashes need to be escaped, because they have a special meaning to the awk program. Below another example where we search the /etc directory for files ending in ".conf" and starting with either "a" or "x", using extended regular expressions: kelly is in /etc> ls -l | awk '/\
Bash Guide for Beginners amd.conf antivir.conf xcdroast.conf xinetd.conf kelly is in /etc> The END statement can be added for inserting text after the entire input is processed: kelly is in /etc> ls -l | \ awk '/\
Page 1 and 2:
Bash Guide for Beginners Machtelt G
Page 3 and 4:
Bash Guide for Beginners Table of C
Page 5 and 6:
Bash Guide for Beginners Table of C
Page 7 and 8:
Table of Contents Glossary C.......
Page 9 and 10:
Introduction 1. Why this guide? The
Page 11 and 12:
Revision 1.6 2005-03-01 Revised by:
Page 13 and 14:
Bash Guide for Beginners See Chapte
Page 15 and 16:
Bash Guide for Beginners mia:~> cat
Page 17 and 18:
Bash Guide for Beginners When invok
Page 19 and 20:
More information about the file des
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
Page 27 and 28:
Bash Guide for Beginners stop in ea
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
Page 59 and 60: of the whitespace characters "space
Page 61 and 62: Bash Guide for Beginners /dev/hda5
Page 63 and 64: Bash Guide for Beginners 3.7. Summa
Page 65 and 66: Two regular expressions may be conc
Page 67 and 68: LABEL=/ / ext3 defaults 1 1 If this
Page 69 and 70: cathy ~> ls -ld [[:digit:]]* drwxrw
Page 71 and 72: Bash Guide for Beginners p Print te
Page 73 and 74: sandy ~> sed -n '/a text/,/This/p'
Page 75 and 76: Bash Guide for Beginners # This is
Page 77 and 78: Chapter 6. The GNU awk programming
Page 79: Bash Guide for Beginners 121script.
Page 83 and 84: Bash Guide for Beginners record1 re
Page 85 and 86: Bash Guide for Beginners 6.3.6. The
Page 87 and 88: Chapter 7. Conditional statements I
Page 89 and 90: Bash Guide for Beginners Table 7-2.
Page 91 and 92: Bash Guide for Beginners 7.1.2.2. N
Page 93 and 94: [root@elegance root]# We switch to
Page 95 and 96: Bash Guide for Beginners echo "Prop
Page 97 and 98: Bash Guide for Beginners We use the
Page 99 and 100: Bash Guide for Beginners case EXPRE
Page 101 and 102: Upon successful condition testing,
Page 103 and 104: Bash Guide for Beginners bit better
Page 105 and 106: 8.2. Catching user input 8.2.1. Usi
Page 107 and 108: Bash Guide for Beginners michel ~/t
Page 109 and 110: Bash Guide for Beginners # DO NOT E
Page 111 and 112: File descriptor 5 Bash Guide for Be
Page 113 and 114: Bash Guide for Beginners The result
Page 115 and 116: Bash Guide for Beginners ♦ Compre
Page 117 and 118: Bash Guide for Beginners for i in `
Page 119 and 120: touch pic-`date +%s`.jpg sleep 300
Page 121 and 122: DISKFUL=$(df -h $WEBDIR | grep -v F
Page 123 and 124: ;; 2) $FORTUNE startrek ;; 3) $FORT
Page 125 and 126: [carol@octarine ~/test] ls -a ./ ..
Page 127 and 128: Bash Guide for Beginners 9.7.2. Exa
Page 129 and 130: Chapter 10. More on variables In th
Page 131 and 132:
Bash Guide for Beginners [bob in ~]
Page 133 and 134:
if [ -z $1 ]; then echo "Usage: $0
Page 135 and 136:
10.3.3. Transformations of variable
Page 137 and 138:
Bash Guide for Beginners The opposi
Page 139 and 140:
Chapter 11. Functions In this chapt
Page 141 and 142:
The commands after && are only exec
Page 143 and 144:
zip2 "$TAR" echo "...done." >> "$LO
Page 145 and 146:
Chapter 12. Catching signals In thi
Page 147 and 148:
Bash Guide for Beginners maud: ~> k
Page 149 and 150:
Bash Guide for Beginners 2. Write a
Page 151 and 152:
Bash Guide for Beginners jobs kill
Page 153 and 154:
if [ $i -eq 5 ] ArrowUp+Enter or !!
Page 155 and 156:
cd Change directory. cdp/cdplay An
Page 157 and 158:
Bash Guide for Beginners gimp grep
Page 159 and 160:
Send and receive mail. man Read man
Page 161 and 162:
Bash Guide for Beginners rsh RPM Pa
Page 163 and 164:
W Bash Guide for Beginners w Show w
Page 165 and 166:
Index A aliases Section 3.5.1 ANSI-
Page 167 and 168:
Bash Guide for Beginners Section 3.
Page 169 and 170:
J Bash Guide for Beginners K kill k
Page 171 and 172:
eadonly Section 10.1.3 regular expr
Page 173:
Bash Guide for Beginners vi(m) Sect
show all

Bash-Beginners-Guide

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?