libnet-ssh-perl does not contain Net::SSH::Perl as requested by the OP but Net::SSH!
in reply to Re: installing Net::SSH::Perl on ubuntu
in thread installing Net::SSH::Perl on ubuntu
$ dpkg --listfiles libnet-ssh-perl
AFAIK, Debian (and so, Ubuntu) does not have a package for Net::SSH::Perl (what would be libnet-ssh-perl-perl) because the module requires libpari (via Math::Pari) which has a license that's not acceptable for Debian.