Symbols

& (ampersand), Example #1

&& (Boolean and), Example #1

< > (angle brackets), Functions

> (right angle bracket), Functions

bash shell, interactive function entry, Functions

' (backquotes), Command substitution, Checking process status and sending alerts

command quoting in bash, Checking process status and sending alerts

command substitution, Command substitution

(backslash), Objective 1: Work on the Command Line

escaping shell metacharacters, Objective 1: Work on the Command Line

^ (caret), beginning of line matching in regular expressions, mod_rewrite

{ } (curly braces), enclosing function body, Functions

$ (dollar sign), Conventions Used in This Book, Aliases, Configuration files, File tests, Variables, Checking process status and sending alerts

$# variable, Configuration files

$( ) notation, command quoting, Checking process status and sending alerts

$? variable, File tests

in variable names, Aliases, Variables

user prompt, Conventions Used in This Book

! (exclamation mark), Boolean not operator, Example #1

# (hash mark), Conventions Used in This Book, /etc/printcap, Configuration files, Executable files, bash

#! (she-bang line), Executable files, bash

in comments, /etc/printcap, Configuration files

/etc/printcap file, /etc/printcap

root shell prompt, Conventions Used in This Book

. (period), Using at, mod_rewrite

at job input and, Using at

regular expressions, matching any single character, mod_rewrite

| (pipe character), Example #1

|| (Boolean or), Example #1

+ (plus sign), regular expression modifier, mod_rewrite

" (quotes, double), Examples, Variables

in regular expressions, Examples

in shell scripts, Variables

' (quotes, single), Examples, Aliases

aliased commands, Aliases

in regular expressions, Examples

/ (root) filesystem, Larger systems, System role, Inodes, The root filesystem and mount points, The root filesystem and mount points, The root Filesystem, The /usr filesystem, The /var filesystem, The stream editor, sed, ln, initrd and /linuxrc on Debian

/usr directory, The /usr filesystem

/var directory, The /var filesystem

directories, The root Filesystem

mount points and, The root filesystem and mount points

partitioning guidelines, System role

pivot_root command, initrd and /linuxrc on Debian

; (semicolon), command separator, Entering multiple-line commands interactively

~ (tilde), File and directory management commands, Configuration files, Checking process status and sending alerts

in mail, Checking process status and sending alerts

shortcut for home directory, File and directory management commands, Configuration files

( ) parentheses, bash functions, Functions

1024-cylinder limit, 1024-cylinder limit