# Get capacity metrics from df
    `df -PT`.split("\n").drop(1).each do |line|
      begin
        timestamp = Time.now.to_i
	fs, _type, _blocks, used, avail, capacity, mnt = line.split
	===========
          metrics = {
              "#{mnt}.used" => used,
              "#{mnt}.avail" => avail,
              "#{mnt}.capacity" => capacity
          }
	iterate over metric key value
	  send_data_to_sensu key, value, timestamp
        ========= vs
        =========
           ['used','avail','capacity'].each {|item|
             send_data_to_sensu item, '#{item}', timestamp
        =========
        end
      end
    end