title: How to solve "invoke-rc.d: policy-rc.d denied execution of start." when building a container Ubuntu 14.04 and installing apache2?
body: <p>I am trying to install apache2 after a building image process.
  This is the code I am using in the Dockerfile.</p>
  
  <pre><code>FROM ubuntu:14.04
  RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
  
  ENV DEBIAN_FRONTEND noninteractive
  
  RUN sudo apt-get update
  RUN sudo apt-get install -y apache2
  </code></pre>
  
  <p>After the process I get the apache installed but I get the follow error (red display in terminal)</p>
  
  <pre><code>...
  invoke-rc.d: policy-rc.d denied execution of start.
  ...
  </code></pre>
  
  <p>How to solve that issue? If it is an issue.</p>