title: "grep: line too long" error message
body: <p>I used the following syntax in order to find IP address under <code>/etc</code></p>
  
  <p>(answered by Dennis Williamson in superuser site)</p>
  
  <p>but I get the message "grep: line too long".</p>
  
  <p>Someone have idea how to ignore this message and why I get this?</p>
  
  <pre><code>  grep -Er '\&lt;([0-9]{1,3}\.){3}[0-9]{1,3}\&gt;' /etc/
    grep: line too long
  </code></pre>