title: It is possible to run a command inside a Docker container from another container?
body: <p>Here's my scenario.</p>
  
  <p>I have 2 Docker containers:</p>
  
  <ul>
  <li>C1: is a container with Ruby (but it could be anything else) that prepares data files on which it must perform a calculation in Julia language</li>
  <li>C2: is a container with Julia (or R, or Octave...), used to perform the calculation, so as to avoid installing Julia on the same system or container that run Ruby code</li>
  </ul>
  
  <p>From the host, obviously, I have no problem doing the processing.
  Usually when two containers are linked (or belong to the same network) they communicate with each other via a network exposing some door. In this case Julia does not expose any door.</p>
  
  <p>Can I run a command on C2 from C1 similar to what is done between host and C2?
  If so, how?</p>
  
  <p>Thanks!</p>