title: dial tcp: lookup xxx.xxx.xxx.xxx: no such host
body: <p>Trying to push an docker image to private docker repository. but getting error like:  <code>"dial tcp: lookup xxx.xxx.xxx.xxx: no such host"</code>. 
  I have logged in correctly to the repository and build succeeded.</p>
  
  <p>The following command using to push the image to private <code>repo: 
  sud docker push x.x.x.x:446/dns/graphs</code></p>