or download this
$ cpan --version
/usr/bin/cpan version 1.61 calling Getopt::Std::getopts (version 1.07
+[paranoid]),
running under Perl version 5.18.2.
[Now continuing due to backward compatibility and excessive paranoia
+.
See 'perldoc Getopt::Std' about $Getopt::Std::STANDARD_HELP_VERSION
+.]