To install CPAN::MirrorMerger::Storage::S3, copy and paste the appropriate command in to your terminal.
cpanm
cpanm CPAN::MirrorMerger::Storage::S3
CPAN shell
perl -MCPAN -e shell install CPAN::MirrorMerger::Storage::S3
For more information on module installation, please visit the detailed CPAN module installation guide.