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Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
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26.1.5 General tools

A few general-purpose tools are shipped with perl, mostly because they came along modules included in the perl distribution.

piconv
piconv is a Perl version of iconv, a character encoding converter widely available for various Unixen today. This script was primarily a technology demonstrator for Perl 5.8.0, but you can use piconv in the place of iconv for virtually any case.
ptar
ptar is a tar-like program, written in pure Perl.
ptardiff
ptardiff is a small utility that produces a diff between an extracted archive and an unextracted one. (Note that this utility requires the Text::Diff module to function properly; this module isn't distributed with perl, but is available from the CPAN.)
shasum
This utility, that comes with the Digest::SHA module, is used to print or verify SHA checksums.
ISBN 9781906966027Perl Language Reference ManualSee the print edition