I was looking for a perl library on my system- once I found it, I didn’t know if my perl was using it properly or not.
Here’s how to answer that question: Check if it is in the list:
perl -e 'foreach (@INC) { print "$_\n"; }' | xargs --replace find {} -name "*.pm" -print
To print out all the entries in @INC, the perl library include path:
perl -e 'foreach (@INC) { print "$_\n"; }'