To install CPAN::Test::Dummy::MultiPkgVer, copy and paste the appropriate command in to your terminal.
cpanm
cpanm CPAN::Test::Dummy::MultiPkgVer
CPAN shell
perl -MCPAN -e shell install CPAN::Test::Dummy::MultiPkgVer
For more information on module installation, please visit the detailed CPAN module installation guide.