Finds hostname aliases for IP's and vice versa.
Not my effort so dont vote it up, but v useful.
use Net::hostent;
use Socket;

print map (($h = gethost($_)) ? ("$_ -> " . join(', ', $h->name, @{$h-
+>aliases}, 
                                map(inet_ntoa($_),  @{$h->addr_list})
                                ). "\n")
                              : $_ (unknown host)\n", @ARGV);

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In reply to hostname aliases by agoth

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