title: How can i check my created namespace?
body: <p>Using <code>clone()</code> or <code>unshare()</code>, we can create a network namespace. Just as the command:</p>
  
  <pre><code>ns_exec -nm -- /bin/bash
  </code></pre>
  
  <p>(see <a href="http://lxc.sourceforge.net/index.php/about/kernel-namespaces/network/configuration/" rel="nofollow noreferrer">http://lxc.sourceforge.net/index.php/about/kernel-namespaces/network/configuration/</a>)</p>
  
  <p>If I have created several network namespaces with <code>ns_exec</code> command, where can I see them? or
  How can i count the numbers of network namespaces?</p>