How can I check if a Perl module is installed on my system from the command line?

Question

I tried to check if XML::Simple is installed in my system or not.

perl -e \'while (<@INC>) { while (<$_/*.pm>) { print \"$_\\n\"; } }\'
         


        

Answer 1

What you're doing there is not recursing into directories. It is only listing the modules in the root directory of the @INC directory.

The module XML::Simple will live in one of the @INC paths under XML/Simple.pm.

What he said above to find specific modules.

CPAN explains how to find all modules here, see How to find installed modules.