Index
A note on the digital index
A link in an index entry is displayed as the section title in which that entry appears. Because some sections have multiple index markers, it is not unusual for an entry to have several links to the same section. Clicking on any link will take you directly to the place in the text in which the marker appears.
Symbols
- ! (exclamation point)
- != (not equal to operator), Integer Variables and Arithmetic
- != (string comparison operator), String comparisons
- conditional not operator, Combinations of Exit Statuses
- debugger command, Commands
- environment variable, Built-In Shell Variables
- event designators, History Expansion
- extended pattern-matching operator, Extended Pattern Matching
- logical not operator, Integer Variables and Arithmetic
- negation operator, File attribute checking
- negation wildcard, Filenames, Wildcards, and Pathname Expansion
- process ID shell variable, Process ID Variables and Temporary Files
- " (double quotes)
- arithmetic expressions in, Integer Variables and Arithmetic
- around shell variables, Variables and Quoting
- around special characters, Quoting
- backslash preceding, Quoting Quotation Marks
- command line processing of, Quoting
- # (hash mark)
- ## (pattern-matching operator), Patterns and Pattern Matching
- array element length operator, Arrays
- comments, Syntax of String Operators
- environment variable, Positional Parameters, Built-In Shell Variables
- length operator, Length Operator
- pattern-matching operator, Patterns and Pattern Matching, Advanced Examples: pushd and popd ...
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