steps:
> tar xvfz pari-2.1.7.tgz
> cd pari-2.1.7
> mv ../Math-Pari-2.0305_01080604a.tar.gz .
> tar xvfz Math-Pari-2.0305_01080604a.tar.gz
> cd Math-Pari-2.0305_01080604a
> perl Makefile.PL && make && make test && make install
> perl -MCPAN -e 'install Net::SSH::Perl'