Perl
This is a Guide to using Perl, and installing and fixing modules.
Installation commands
You can install a module with the following command.
cpan -i
You can force an installation of a module with the following command.
cpan -fi
Will show you the contents of the @INC, Which is essentially the path's that the installer is going to pull from and look in.
perl -V
In the event that a forced installation does not work, take the above command perl -V and look for what you are trying to install and remove it manually.