title: Permission denied while trying to connect to the Docker daemon socket
body: <p>On Ubuntu 16.04 LTS whenever trying using docker login command the following warring message will be show : </p>
  
  <pre><code>docker login
  Warning: failed to get default registry endpoint from daemon (Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.30/info: dial unix /var/run/docker.sock: connect: permission denied). Using system default: https://index.docker.io/v1/
  Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
  Username: csomethingr
  Password: 
  Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.30/auth: dial unix /var/run/docker.sock: connect: permission denied
  </code></pre>
  
  <p>Any solution?</p>