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~>perldoc LWP::UserAgent | ack -i \\bhead\\b
              requests_redirectable   ['GET', 'HEAD']
           headers from the <head> section of HTML documents. The defa
+ult is
...
       $ua->head( $url )
       $ua->head( $url , $field_name => $value, ... )
           This method will dispatch a "HEAD" request on the given $ur
+l.

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perl -MWWW::Mechanize -le 'print WWW::Mechanize->new->head("http://per
+lmonks.org")->message'
OK