title: how to grep listening on port 80 that can also filter other port contain 80 such as 8080 8088 ...?
body: <p>I want to use bash to grep if any process is listening on port 80,but now I stumble upon other port number which annoys me. How can I filter this in grep?</p>
  
  <pre><code>netstat -ant|grep LISTEN|grep 80|wc -l
  </code></pre>
  
  <p>It also outputs other records such as 8080 8088 and so on.</p>