#!/usr/bin/ruby                                                                                                                                                                                        
puts "Enter the IP Address of the New DNS Servers - Note this will overwrite all current Entrys"
dns_ip1 = gets.chomp
puts "You entered #{dns_ip1}, would you like to add another ip? Answer Yes or No"
dns_answer = nil
loop do
  dns_answer = gets.chomp
  if %w(Yes Y yes YES y).include?(dns_answer)
    puts "Please Enter the Second IP e.g 1.2.3.4"
    dns_ip2 = nil
    loop do
      dns_ip2 = gets.chomp
      if !%w(1 2 3 4 5 6 7 8 9).include?(dns_ip2) && !%w(.).include?(dns_ip2)
        puts "You must Enter an IPv4 Address with Standard Dot Notation"
      else
        break
      end
    end
  elsif
    %W(No N no NO n).include?(dns_answer)
    puts "OK, the DNS Entrys have been updated"
    dns_change1 = `echo "nameserver #{dns_ip1}" > /etc/resolv.conf`
    dns_table2 = `cat /etc/resolv.conf`
    puts "#{dns_table2}"
  else
    "Puts You must Enter either Yes or No"
  end
  puts "The DNS Configuration Table has been updated to include the entrys #{dns_ip1} #{dns_ip2}"
  puts
  dns_change2 = `echo "nameserver #{dns_ip1}" > /etc/resolv.conf`
  dns_change3 = `echo "nameserver #{dns_ip2}" >> /etc/resolv.conf`
  puts
  dns_table3 = `cat /etc/resolv.conf`
  puts "#{dns_table3}"
  break
end