CPAN

From MattWiki

CPAN is the Perl download and update program

yum install cpan

to install with cpan run

cpan

If it asks you to manualy install cpan say no.

install NetPacket::Ethernet
install Proc::Simple

For more info on installing and using CPAN see: http://cpan.org/misc/cpan-faq.html#How_install_Perl_modules