Simple ips to certain dns

172:rp young$ cat dns_ip.rb 

#!/usr/bin/env ruby

def check

 if ARGV[0] == nil

  abort 'please input ARGV[0]'

 end

end

check

require 'resolv'

def check_address

    Resolv.each_address(ARGV[0]) do |ip|

      puts ip

    end

end

check_address

172:rp young$ ruby dns_ip.rb naver.com

125.209.222.142

202.131.30.11

202.131.30.12

125.209.222.141

172:rp young$