How can I know where a Perl module is installed? - perl

Question

I want to know where the IO::Socket::SSL module, or more specifically, where the file SSL.pm is located. I already know that I have installed IO::Socket::SSL because use IO::Socket::SSL works.

Answer 1

I always use something like this:
%> perl -MIO::Socket::SSL -e 'print $INC{"IO/Socket/SSL.pm"}';
and you get the path or an error if the module it is not installed in a proper path where perl can get it.
If you want to see if that module was installed:
%> perl -MIO::Socket::SSL -e 1
if you don't get any error, it's installed.
Sometimes it's important to see the version number of the installed package:
%> perl -MIO::Socket::SSL -e 'print $IO::Socket::SSL::VERSION';
Or, if you are working on Windows, you have to use double-quotes:
C:\> perl -MIO::Socket::SSL -e "print $IO::Socket::SSL::VERSION";

Answer 2

This should work
perldoc -l 'IO::Socket::SSL'
or alternatively in cmd.exe
perldoc -l "IO::Socket::SSL"
-l switch means "Display the module's file name". I find that it shows the fully qualified path to a module or (if applicable) to the module's external POD which is in the same directory as the module itself.

Answer 3

You can do:
perl -E'use IO::Socket::SSL; say $INC{"IO/Socket/SSL.pm"};'
But a rule of thumb it most modules are typically in /usr/share/perl5 on ubuntu.

Answer 4

The pmtools package provides an assortment of useful command line utils for finding where a package is installed (pmpath), what version it is at (pmvers), etc