Index

A number represents a single reference to a topic.
A number with a "+" sign represents a longer discussion of a topic.


Symbols   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Z   

Symbols
! operator 1 2
$ operator 1 2
  in regular expressions 1
$! variable 1 2 3
$# variable 1 2 3 4
$$ variable 1
$(( ... )) operator 1+
$() operator 1
$* variable 1+ 2
$- variable 1
$? variable 1 2
$@ variable 1+ 2
' and " operators 1 2 3
( and ) operators 1 2
  in regular expressions 1 2+ 3
* operator 1 2
  in regular expressions 1
*? operator (in Perl regular expressions) 1
+ operator (in regular expressions) 1
+? operator (in Perl regular expressions) 1
. builtin 1+
. operator (in regular expressions) 1
$0 variable 1
> operator 1
>& operator 1 2+ 3+
>> operator 1
? operator 1 2
  in regular expressions 1
& operator 1
  and expr 1
&& operator 1 2 3
?: operator
  in Perl regular expressions 1
$HOME variable 1
$IFS variable 1
  and C shell 1
  and read 1
<< operator 1
$PATH variable 1
$PPID variable 1
$PWD variable 1
$status variable 1
$UID variable 1
$USER variable 1
[ and ] operators 1 2
  in regular expressions 1
[ command 1
\ operator 1 2
^ operator
  as positional anchor in regular expressions 1
  in regular expression character classes 1
$_ variable 1
` operator 1 2 3
{ and } operators 1 2 3 4
| operator
  and case 1
  and expr 1
  and regular expressions 1
  in regular expressions 1
|& operator (C shell) 1
|| operator 1 2
A
absolute path, obtaining from relative path 1
access control lists 1+ 2+
alias builtin 1
anonymous subroutines 1
ANSI escape sequences 1+
  and echo (terminfo) 1
  and printf (terminfo) 1 2
  and tput (terminfo) 1
  clearing parts of the screen 1+
  color manipulation 1+
  cursor and scrolling manipulation 1+
  reset terminal 1
  tab stop manipulation 1 2
  text attribute manipulation 1+
append operator 1
AppleScript (using osascript) 1+
apropos command 1
argument handling 1
arrays
  in AWK 1+
  simulating with eval 1
asterisk operator 1 2
authentication 1+
AWK 1+
  arrays 1+
  basic syntax 1
  BEGIN and END patterns 1+
  case-insensitive matching 1
  common mistakes 1 2 3 4
  conditional filter rules 1+
  conditional pattern matching 1+
  control statements 1+
  expression ranges 1+
  field separators 1+
  file input and output 1+
  functions 1+
  input and output 1
  ordinal ranking 1+
  record separators 1+
  regular expressions 1+
  relational expressions 1+
  running a script 1
  skipping records and files 1+
  special variables 1
  splitting strings into arrays 1+
awk command 1 2 3
B
background execution 1
backtick operator 1
bash command 1
BASH
  exporting behavior of 1
  extended for loop syntax 1
  math support extension 1
  substring expansion extension 1
  window size variable behavior 1
basic script 1
bc command 1+ 2 3
bg command 1
braces 1 2 3
brackets 1 2
  in regular expressions 1
break statement 1 2 3 4
built-in commands 1
builtins
  . 1+
  alias 1
  echo 1
  export 1
  getopts 1+
  jobs 1
  setenv 1
  shift 1+
  source 1+
  trap 1
  unset 1 2
  unsetenv (C shell) 1
  wait 1
bunzip2 command 1
bzip2 command 1
C
C shell limitations
  comparison operators 1
  control statements 1 2
  inline execution 1
  input and output 1 2 3
  job and process management 1
  order of operations 1
  subroutines 1 2
case statement 1
cat command 1 2
cd command 1 2
chaining execution 1+
character classes
  regular expression syntax 1
  shell globbing syntax 1
chflags command 1 2
chgrp command 1+ 2
chmod command 1+ 2+ 3
chown command 1 2+ 3
color escape sequences (ANSI) 1+
command-line tools, compatibility 1+
commands, shell scripting. See individual commands.
common mistakes
  in AWK 1 2 3 4
  in file redirection 1
  in math operations 1+
  in process management 1
  in regular expressions 1 2 3 4
  in subroutines 1
  regular expressions 1
compatibility
  >& behavior 1
  access control lists 1 2
  AWK length function 1
  BASH extensions 1 2 3
  bc command 1
  command-line tools 1+
  device I/O 1
  disk management and partitioning 1
  field separator behavior 1
  file system hierarchy 1
  GNU getopt 1
  legacy mode and compat manual page 1
  locales 1
  managing users and groups 1
  math syntax 1
  source builtin 1
  special variables 1
  ZSH extensions 1 2
  _POSIX2_VERSION and compat manual page 1
compress command 1
concurrent execution 1
continue statement 1 2 3 4
control statements 1+
counting lines in a file 1
cp command 1 2
csh command. See also C shell; specific statements.
current working directory 1
cursor escape sequences (ANSI) 1+
cut command 1 2
D
date command 1 2
dd command 1
default shell 1
delay loops 1
/dev/random device 1
dialects, of shell scripts 1 2
diskutil command 1
do statement 1
dollar sign operator 1 2
done statement 1
double-quotation mark 1 2
E
echo builtin 1 2
echo command 1
elif statement 1
else statement 1
env command 1
environment variable. See also variables.
environment variables 1
esac statement 1
escape sequences. See also ANSI escape sequences.
eval builtin 1+
exit status
  of scripts 1
  of subroutines 1
expansion of variables 1+
expect command 1
export builtin 1
expr command
  and math 1+
  and regular expressions 1
  and strings 1
  defined 1
F
false command 1
fg command 1
fi statement 1
field separators 1 2+
FIFO 1+ 2+
file command 1
file descriptors
  opening and closing 1+ 2+
  redirecting 1+
files, reading and writing 1
find command 1
floating-point computation 1+ 2
flow control 1
for loops
  with lists 1
  with numerical comparison 1
for statement 1
  in AWK 1+
foreach statement (C shell) 1
frequently used interactive commands 1
fsck command and variants 1
functions. See subroutines.
funzip command 1
G
GetFileInfo command 1
getopt command 1+ 2
getopts builtin 1+
getting started 1
globbing 1+
grep command 1 2 3 4
gunzip command 1
gzcat command 1
gzip command 1
H
hdiutil command 1
head command 1+ 2
home directory 1
I
I/O
  in AWK 1+
  nonblocking 1
  using read 1
  using redirection 1
  with devices 1
if statement 1
  C shell globbing extensions 1
  in AWK 1+
IFS variable
  and $* expansion 1
ignoring signals 1
image manipulation with AppleScript 1+
inline execution 1
  parsing order of 1
interactive tools, scripting 1+
J
job control 1
job numbers 1
jobs builtin 1
jobs, concurrent execution of 1
join command 1
K
kill command 1
L
less command 1
line endings, converting between 1+
linked list, simulating with eval 1
ln command 1
local statement 1
local variable 1
locale command 1
locales 1
login command 1 2
ls command 1 2
M
man command 1
man pages 1
math
  common mistakes 1+
  floating-point 1+ 2
  using bc 1+
  using Perl 1+
  with $(( ... )) 1+
  with expr 1+
merging redirect operator 1
mkdir command 1 2
mkfifo command 1 2+ 3+ 4
more command 1
mount command and variants 1
mv command 1 2 3
N
nonblocking I/O 1
O
open command 1
open tool 1
operator precedence rules 1
operators
  See individual symbols.
ordinal rank of characters 1+
osascript tool 1+
P
parent directory 1
parentheses 1
path characters 1
PATH environment variable 1 2
path, of current shell script 1
performance
  choosing control statements 1
  deferring console output 1
  deferring work 1
  minimizing regular expressions 1
  reducing comparisons 1
  reducing computations 1
  reducing external commands 1
  reducing use of eval 1
  using builtins instead of commands 1
perl command 1 2
Perl
  floating-point math 1+
  ordinal ranking 1+
  regular expression extensions 1+
  word boundaries 1
pipes
  in Bourne shell 1
  in C shell 1
  named 1+ 2+
pr command 1
printenv command 1 2
printf command
  for printing prompts 1
  in AWK 1
  tabular layouts with 1+
ps command 1
pwd command 1
Python regular expression extensions 1+
Q
quotation mark 1 2
  in Bourne shell 1
  in C shell 1
quoting special characters
  in Bourne shell 1
  in C shell 1
  in regular expressions 1
R
random numbers, obtaining 1
read command 1
redirect operator 1
redirection
  in AWK 1+
  pipes and 1+
regular expressions
  additional reading 1
  capture operators 1+
  character classes 1
  common mistakes 1 2 3 4 5
  custom character classes 1+
  grouping 1
   without capturing 1
  matching any character 1
  matching beginning and end of lines 1
  mixing capturing and grouping operators 1
  modifiers 1+
  noncapturing parentheses 1
  nongreedy matching 1
  overall syntax 1
  Perl and Python extensions 1+
  Perl character class shortcuts 1+
  positional anchors 1
  predefined character classes 1+
  quoting special characters 1
  repetition operators 1
   nongreedy 1
  using an empty subexpression 1
  using parentheses and pipe for multiple options 1
  variable substitution 1
result code
  of scripts 1
  of subroutines 1
return statement 1
return value
  of scripts 1
  of subroutines 1
rm command 1 2
rmdir command 1 2
running programs 1
S
scoping rules 1
scrolling manipulation with ANSI escape sequences 1+
security
  access control lists 1+ 2+
  and $UID variable 1
  and $USER variable 1
  and environment variables 1 2 3+ 4
  and input files 1+
  and temporary files 1+ 2+
  authentication 1+
  file permissions 1+
  injection attacks 1+
sed command 1 2 3
self-execution of shell scripts 1
setenv builtin 1
SetFile command 1
shar command 1
shell script dialects 1 2
shells
  aborting programs 1 2 3
  built-in commands 1
  valid path characters 1
shift builtin 1+
signals
  trapping 1+
single-quotation mark 1 2
sleep command 1
sort command 1 2
source builtin 1+
special characters
  behavior of 1+
  entering 1+
  quoting 1+
standard error 1
standard input 1
standard output 1
stat command 1
statements. See individual statement.
stderr (standard error) 1 2
stdin (standard input) 1 2
stdout (standard output) 1 2
stty command 1
subroutines
  anonymous 1
  common mistakes 1
  named 1
substrings 1+
switch statement (C shell) 1
T
tail command 1+ 2
tar command 1
tee command 1
Terminal application 1 2
terminating programs 1
test command 1
then statement 1
tput command 1
tr command 1 2
trap builtin 1
trapping signals 1+
true command 1
U
umount command 1
uncompress command 1
uniq command 1
unset builtin 1 2
unsetenv builtin (C shell) 1
unzip command 1
uuencode and uudecode commands 1
V
variables
  and source builtin 1
  arguments and 1
  environment 1
  exit status 1
  expansion 1+
  exporting 1+
  local to subroutine 1
  overriding 1+
  printing 1+
  scope of 1
  special 1+
volumes 1
W
wait builtin 1
while statement 1
  in AWK 1+
wildcards
  in filename globbing 1
  in regular expressions 1+
window
  detecting size changes 1
  determining current size 1
X
xargs command 1
Z
zcat command 1
zip command 1
ZSH
  math support extension 1
  extended for loop syntax 1


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