Mini tutorial for installing CPAN modules without an Internet Connection

On a machine with an Internet connection, install minicpan:

cpan CPAN::Mini::App

(?) Prepare a ~/.minicpanrc configuration file:

local:  /var/mirrors/minicpan/
remote: http://www.cpan.org/
exact_mirror: 1
[download]

Make (or update) your local mirror:

minicpan

Copy your CPAN mirror to your isolated ("air gapped") machine.

On your isolated machine, use cpan with your mirror:

$ cpan
cpan> o conf urllist unshift file://$LOCAL
cpan> o conf commit
cpan> reload index
[download]