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A Practical Guide to Ubuntu Linux®, Fourth Edition by Mark G. Sobell

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Main Index

An italic page number such as 123 indicates a definition. A light page number such as 456 indicates a brief mention. Page numbers followed by the letter t refer to tables. Only variables that must always appear with a leading dollar sign are indexed with a leading dollar sign. Other variables are indexed without a leading dollar sign.

Symbols

–– argument 155, 1011

^ in regular expressions 1164

^ quick substitution character 390

, (comma) operator 1083

; control operator 170, 347, 1085

;; control operator 1028, 1085

: (null) builtin 1059, 1071

:– substitutes default values for a variable 1059

::1 (IP address) 485

:? sends to standard error an error message for a variable 1060

:= assigns default values for a variable 1059

! (NOT) Boolean ...

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