Perl is famous for its tremendous number of modules ready to use. They can be fetched and installed from the Comprehensive Perl Archive Network (CPAN)
One of the best way to add new modules into your system is to use the program cpan.
Before any manual installation, make sure that these modules are not packaged by Debian. According to the Debian Perl Policy , the Perl modules provided by Debian are located in the following folders :
For the core modules : (provided by perl-base and perl-modules packages)
For Debian packed modules :
Concerning the modules installed with cpan command :