installed

In my inaugural PHP entry, an answer to a simple question: Where are PHP libraries installed?

Answer: I just installed a PHP library named HTTP_Request using PEAR (the PHP Extension and Application Repository), and it was installed into the following directory:

As I started working on a new Unix system yesterday I needed to know if that system had certain Perl modules installed on it that I needed. In my case the specific Perl modules I needed were SOAP::Lite and the Error module.

One way to find out was to just install my Perl program and then try to run it, but because I knew I needed these modules beforehand I just ran the following commands to see if these modules were installed on this HP-UX system:

perl -e 'use SOAP::Lite;'

and