cpan[3]> install Crypt::Password
Warning: Cannot install Crypt::Password, don't know what it is.
Try the command

    i /Crypt::Password/

to find objects with matching identifiers.

cpan[4]> i /Crypt::Password/
Module  < Crypt::Password::StretchedHash (RITOU/Crypt-Password-StretchedHash-0.05.tar.gz)
Module  < Crypt::Password::StretchedHash::HashInfo (RITOU/Crypt-Password-StretchedHash-0.05.tar.gz)
Module  < Crypt::Password::Util  (PERLANCAR/Crypt-Password-Util-0.12.tar.gz)
3 items found