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rename renames the filenames supplied according to the rule specified as the |
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first argument. The perlexpr argument is a Perl expression which is expected |
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to modify the $_ string in Perl for at least some of the filenames specified. |
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If a given filename is not modified by the expression, it will not be renamed. |
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If no filenames are given on the command line, filenames will be read via |
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standard input. |
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WWW: https://metacpan.org/release/File-Rename |