title: NSLOOKUP is Not working on Ubuntu 12.04
body: <p>I had provided FQDN of the server in host file and did all the necessary changes even after i am getting error on ubuntu 12.04
  i am executing command</p>
  
  <pre><code>nslookup hadoopmaster.impps.co.in
  
  Server:         172.26.32.7
  Address:        172.26.32.7#53 
  ** server can't find hadoopmaster.impps.co.in: NXDOMAIN
  </code></pre>
  
  <p>and hostname -f command is giving output</p>
  
  <pre><code>hadoopmaster.impps.co.in
  </code></pre>