title: how to use filters the word in bash
body: <p>This is my output from <code>cat /etc/resolve.conf</code></p>
  <p>How can I just show the all nameservers ?</p>
  <pre><code> Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
  #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
  nameserver 192.287.53.7
  nameserver 127.0.0.53
  </code></pre>