sed & awk Pocket Reference by Arnold Robbins

sed & awk Pocket Reference by Arnold Robbins

Author:Arnold Robbins
Language: eng
Format: epub, mobi
Tags: COMPUTERS / Operating Systems / UNIX
ISBN: 9780596103613
Publisher: O’Reilly Media
Published: 2009-02-09T00:00:00+00:00


Patterns

A pattern can be any of the following:

/regular expression/ relational expression pattern-matching expression BEGIN END

Expressions can be composed of quoted strings, numbers, operators, function calls, user-defined variables, or any of the predefined variables described later in Section 1.5.5.

Regular expressions use the extended set of metacharacters and are described earlier in Section 1.3.

The ^ and $ metacharacters refer to the beginning and end of a string (such as the fields), respectively, rather than the beginning and end of a line. In particular, these metacharacters will not match at a newline embedded in the middle of a string.



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