marto@shemp:~$ cpan install RPi-WiringPi
Reading '/home/marto/.cpan/Metadata'
  Database was generated on Tue, 04 Jul 2017 12:53:45 GMT
Warning: Cannot install RPi-WiringPi, don't know what it is.
Try the command

    i /RPi-WiringPi/

to find objects with matching identifiers.

marto@shemp:~$ cpan install HTML-Template
Reading '/home/marto/.cpan/Metadata'
  Database was generated on Tue, 04 Jul 2017 12:53:45 GMT
Warning: Cannot install HTML-Template, don't know what it is.
Try the command

    i /HTML-Template/

to find objects with matching identifiers.
marto@shemp:~$ cpanm RPi-WiringPi
! Finding RPi-WiringPi on cpanmetadb failed.
! Finding RPi-WiringPi () on mirror http://www.cpan.org failed.
! Couldn't find module or a distribution RPi-WiringPi
marto@shemp:~$ cpanm HTML-Template
! Finding HTML-Template on cpanmetadb failed.
! Finding HTML-Template () on mirror http://www.cpan.org failed.
! Couldn't find module or a distribution HTML-Template