[NTLUG:Discuss] Is a perl module installed?

[Bobby Wrenn]

How do I determine if a perl module (mason) is installed?

Also, I am running Mandrake 9.0 but am installing perl modules with
CPAN. Will that cause any problems?

cpan returns the following for the modules;

cpan> i /Data::Dumper/
CPAN: Storable loaded ok
Going to read /root/.cpan/Metadata
  Database was generated on Mon, 16 Dec 2002 13:54:15 GMT
Module          Data::Dumper    (G/GS/GSAR/Data-Dumper-2.101.tar.gz)
Module          Data::Serializer::Data::Dumper (N/NE/NEELY/Data-Serializer-0.17.tar.gz)
Module          MLDBM::Serializer::Data::Dumper (C/CH/CHAMAS/MLDBM-2.01.tar.gz)
3 items found

cpan> i /Params::Validate/
Module          Attribute::Params::Validate (D/DR/DROLSKY/Params-Validate-0.24.tar.gz)
Module          Params::Validate (D/DR/DROLSKY/Params-Validate-0.24.tar.gz)
2 items found

TIA
Bobby