title: Continuously listen to tcp port via terminal
body: <p>Is it possible to listen to a port continuously?</p>
  
  <p>I listen for incoming tcp notifications with following command </p>
  
  <pre><code>sudo nc -l -p 999
  </code></pre>
  
  <p>But as soon as notification arrives I have to restart listen with same command. Is it possible to listen to port without having to restart command when notifications arrives until user decides to abort listen?</p>