BackPAN-Version-Discover This module can be used to discover exactly which versions of which cpan distributions you have installed, and give you the path to those tarball releases on the backpan. Note: this module is by no means a perfect solution. It makes some educated guesses and some assumptions to try and figure out exactly what you have installed. Vendor-packages modules are a particularly odd case, since many will be modified, and the maintainers may or may not have updated the version numbers. However, most of the time, they will at least install these modules to a separate set of lib dirs that is designated by the perl binary as being the place for them. By default, the scan this module performs skips over those modules. However, on debian-based systems, you can find out what packages you have installed that contain perl modules installed under @INC using this shell snippet: find `perl -e 'print join " ",@INC'` -name '*.pm' 2>/dev/null \ | xargs dpkg -S 2>/dev/null | sed 's/:.*$//' | sort -u INSTALLATION To install this module, run the following commands: perl Build.PL ./Build ./Build test ./Build install SUPPORT AND DOCUMENTATION After installing, you can find documentation for this module with the perldoc command. perldoc BackPAN::Version::Discover You can also look for information at: RT, CPAN's request tracker http://rt.cpan.org/NoAuth/Bugs.html?Dist=BackPAN-Version-Discover AnnoCPAN, Annotated CPAN documentation http://annocpan.org/dist/BackPAN-Version-Discover CPAN Ratings http://cpanratings.perl.org/d/BackPAN-Version-Discover Search CPAN http://search.cpan.org/dist/BackPAN-Version-Discover/ LICENSE AND COPYRIGHT Copyright (C) 2010 Stephen R. Scaffidi This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License. See http://dev.perl.org/licenses/ for more information.