#!/usr/bin/env python

 import paho.mqtt.client as paho   # pip install paho-mqtt

 def on_message(mosq, userdata, msg):
     print "%s (qos=%s, r=%s) %s" % (msg.topic, str(msg.qos), msg.retain, str(msg.payload))

 mqtt = paho.Client()
 mqtt.on_message = on_message

 mqtt.connect("localhost", 1883, 60)
 mqtt.subscribe("linux/+", 0)

 mqtt.loop_forever()