Como visto nos documentos cpantorpm :
The perl module may be obtained in a number of different ways. The perl module may exist on local disk either as an archive file or a directory, or it can be retrieved from a URL or from CPAN.
For example, any of the following ways could be used:
cpantorpm Foo::Bar cpantorpm http://some.host.com/some/path/Foo-Bar-1.00.tar.gz cpantorpm /tmp/Foo-Bar-1.00.tar.gz cpantorpm /tmp/Foo-Bar-1.00