title: Run silent command on linux with perl
body: <p>Hi I'm trying to load in the background so you can tcpdump load silently, by that I mean to load but does not show anything</p>
  
  <p>I had been told that using the command and put the end &amp; would be achieved but the problem is it does not work.</p>
  
  <p>The code is this:</p>
  
  <pre><code>#! usr/bin/perl
  system ("tcpdump-s 0-A 'tcp dst port 80 and (tcp [((tcp [12:1] &amp; 0xf0) &gt;&gt; 2): 4] = 0x504f5354)' &amp; ");
  </code></pre>
  
  <p>What am I doing wrong?</p>