To install , copy and paste the appropriate command in to your terminal.
cpanm
cpanm FRITH/Math-FFT-Libfftw3-0.0.1.tar.gz
CPAN shell
perl -MCPAN -e shell install FRITH/Math-FFT-Libfftw3-0.0.1.tar.gz
For more information on module installation, please visit the detailed CPAN module installation guide.