title: nc: invalid option -- 'z'
body: <p>On RHEL 7.2 OS, I get following error when trying to run nc commnad</p>
  
  <pre><code>nc -z -v -w1 host port
  nc: invalid option -- 'z'
  Ncat: Try `--help' or man(1) ncat for more information, usage options and help. QUITTING.
  </code></pre>
  
  <p>Is there any alternative to it</p>