title: Stop the mosquitto (MQTT) broker from listening to a port using the command line
body: <p>When I ran the Mosquitto (MQTT) broker for the first time there was no issue. But however from he second time when i ran it using default config I could not run the code successfully because of the following error:</p>
  
  <p>1379497253: mosquitto version 1.2 (build date 2013-09-17 17:59:39+0530) starting
  1379497253: Using default config.
  1379497253: Opening ipv6 listen socket on port 1883.
  1379497253: Error: Address already in use</p>
  
  <p>I would like to know how to stop the broker from command line. It'll be nice if someone can help.</p>