Remove all references to the cpan client instead use cpanm throughout the document.
Remove all references to the cpan client instead use cpanm throughout the document.

cpanm is easier to use and does not require any user configuration. By having the user install the cpanm package we were able to eliminate an entire step from the install instructions. Note that the cpanminus package is only available in Ubuntu 11.1 (Oneiric ) and later.


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