====== Installing Perl Modules Centrally ======
Looking for way to install Perl CPAN modules centrally on the JH hub.  Found the following steps.

  - Make personal Perl configuration for use with CPAN
    - On the command line enter in: perl -MCPAN -e 'mkmyconfig'
    - When prompted, press enter to allow automatic configuration.
    - For "What approach do you want?", press Enter or Return to select the default option (local::lib).
    - Press Enter to let the application automatically choose CPAN mirror sites.
    - press Enter to add the necessary environment variables to your shell configuration file.
    - If prompted to run automatic configuration again, press Enter to select [yes].
    - You will see output showing the autoconfiguration is complete written to the following directory
      - /home/username/.cpan/CPAN/MyConfing.pm
  - When returned to the shell prompt, run the CPAN module; enter: perl -MCPAN -e shell
  - Configure the CPAN module to install new modules in your home directory:
    - At the (cpan[1]>) prompt enter: o conf makepl_arg INSTALL_BASE=/home/.hub_local/perl5
    - At the next CPAN prompt, enter: o conf commit
    - At the next CPAN prompt, enter: exit
  - Modify your environment to use the new library of modules:
    - Add the following lines to the end of your .bashrc file:

  export PERL_MM_OPT="INSTALL_BASE=/home/.hub_local/perl5"
  export PERL5LIB="/home/.hub_local/perl5/lib/perl5:$PERL5LIB"
  export PATH="/home/.hub_local/perl5/bin:$PATH"
  eval $(perl -I/home/.hub_local/perl5/lib/perl5 -Mlocal::lib)
  
To install a Perl module run: perl -MCPAN -Mlocal::lib -e 'CPAN::install(Math::Matrix)'\\
To test create a test.pl file and put the following lines in it.
  #!/usr/bin/perl
  use strict;
  use local::lib;
  use Math::Matrix;
Save the file and then execute it.  It should return with no errors.