Any ideas on how I can get to do the simple task of installing these modules system wide?
There's lots of info on it on the web. For the definitive answers look long the local::lib pages on CPAN - basically there are environment variables you can set to say where things are to be installed.
Also, I think when you first run CPAN one of the questions it asks is where to install things - if you let CPAN configure itself it defaults to a local install. You can re-run the CPAN initial config by doing
o conf init
at the CPAN prompt. You may have to clean up your .bashrc as well.
This is probably the most useful link I found
https://stackoverflow.com/questions/32726324/i-installed-a-module-successful...
P.