perl -MLWP::UserAgent -e "print LWP::UserAgent->new->get('http://perlmonks.org/index.pl')->header('x-meta-keywords')"

perl, mod_perl, regular expressions,
                     regexp, xp whoring, CGI, programming,
                     learning, tutorials, questions, answers,
                     examples, vroom, tim, node, experience,
                     votes, code