I found some useful methods in Logging the CPAN Shell by carol.

marto and quester suggested something like this: 

>script -c 'TERM=dumb cpan' -a /root/Desktop/cpan.log
cpan> install Module
cpan>exit

[download]
planetscape suggested something like this: 
cpan> install Module > /root/Desktop/cpan.log
cpan>q

[download]
It prints to log not STDOUT.

In reply to Re: What modules got installed? by Khen1950fx
in thread What modules got installed? by ikegami

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