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Linux in a Nutshell, 6th Edition by Robert Love, Stephen Figgins, Ellen Siever, Arnold Robbins

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Name

sub

Synopsis

sub(regex, str [, target])

Substitute str for first match of the regular expression regex in the string target. If target is not supplied, defaults to $0. Returns 1 if successful, 0 otherwise. Use & in the replacement string to stand for the text matched by the pattern.

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