title: Sum bytes from iptables list output
body: <p>Print num-bytes allowed. </p>
  
  <p>My best attempt as been</p>
  
  <pre><code>sudo iptables -L -n -v -x | grep -i accept
  </code></pre>
  
  <p>This will give me a large list of rules, including the number of bytes in the second column. Unfortunately, getting just that 2nd column is pretty difficult. </p>
  
  <p>One option would be to pipe it into a file, and use cut on the file but the goal is to do it in as few operations as possible. Any help would be appreciated. </p>