title: docker: invalid reference format
body: <p>I was trying to install tensorflow using docker. I used code provided by a book as follows: </p>
  
  <p><code>$ docker run -it -p 8888:8888 –p 6006:6006\ cargo.caicloud.io/tensorflow/ tensorflow:0.12.0</code> </p>
  
  <p>however, the terminal shows error messages </p>
  
  <blockquote>
    <p>docker: invalid reference format</p>
  </blockquote>
  
  <p>I am not familiar with docker and I doubt this error is due to the space key around words  cargo and tensorflow, I tried many ways to rearrange space key but still could not get result. Can anyone familiar with docker solve this issue? thanks.</p>