find: Regular Expressions
8.5 Regular Expressions
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The '-regex' and '-iregex' tests of 'find' allow matching by regular
expression, as does the '--regex' option of 'locate'.
Your locale configuration affects how regular expressions are
interpreted. Environment Variables, for a description of how
your locale setup affects the interpretation of regular expressions.
There are also several different types of regular expression, and
these are interpreted differently. Normally, the type of regular
expression used by 'find' and 'locate' is the same as is used in GNU
Emacs. Both programs provide an option which allows you to select an
alternative regular expression syntax; for 'find' this is the
'-regextype' option, and for 'locate' this is the '--regextype' option.
These options take a single argument, which indicates the specific
regular expression syntax and behaviour that should be used. This
should be one of the following:
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