in reply to When modules install in perl5
/usr/bin/perl might be the location of the Perl executable, but that executable is tiny. Most of the actual software resides in various libraries, accessed by the current PERL5LIB environment-variable settings as well as a list that is compiled into Perl. The aforementioned perldoc lib is a good place to start to find an explanation of how it all works. Also Google "how to install Perl as a non-root user" (... "on a shared-hosting service").
In Section
Seekers of Perl Wisdom