A recent question here on SO got me thinking.
On most Linux distributions that I tried, some Perl modules would be available through the package manager. Others, of
I recommend use only cpan. The modules includes in Linux distro is only to cover package dependency. When you are installing linux without internet access with only CDs, it can't use cpan, so some modules are included as packages, but to a Perl developer this is bad.
Also I used to have a cpan configured to install modules in my home, (.perl) without root login needed.