Ruby: get_interface_name.rb

def get_interface_name
  interfaces = {}
  puts 'Valid network interfaces detected are:'
  interfaces_with_mac = `ifconfig -a | grep -i hwaddr | awk '{ if( match($1, /^eth/) ) {print $1, $5} }'`.lines.map(&:chomp)
  interfaces_with_mac.each_with_index do |x, index|
    interfaces[index] = x.split[0]
    puts "  #{index}) #{x.split[0]} ( #{x.split[1]} )"
  end

  print 'Please choose an interface to configure: '
  interface_to_configure = gets.chomp!.to_i
  interfaces[interface_to_configure]
end