title: startFabric.sh fails with docker compose command not find
body: <p>I am following the tutorial on <a href="http://hyperledger-fabric.readthedocs.io/en/release-1.1/write_first_app.html" rel="nofollow noreferrer">writing your first application</a> to make a sample hyperledger fabric application. I am using Ubuntu 16.04 and I have installed prerequisites as well as binaries and docker images. When I move into fabric-samples/fabcar, after npm install. I run:</p>
  
  <pre><code>./startFabric.sh
  </code></pre>
  
  <p>I get the following error: </p>
  
  <p>docker-compose -f docker-compose.yml down.</p>
  
  <p>./start.sh: line 13: docker-compose: command not found. </p>
  
  <p>I looked into ./startFabric.sh by nano. Line 13 is as follows:</p>
  
  <pre><code>starttime=$(date +%s)
  LANGUAGE=${1:-"golang"}
  </code></pre>
  
  <p>This is a screen shot of the error I get:</p>
  
  <p><a href="https://i.stack.imgur.com/X3eYY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/X3eYY.png" alt="./starFabric.sh and ./startFabric.sh node are not starting my fabric"></a></p>
  
  <p>It may be irrelevant, but I have also issues running .byfn -m up as I have posted on <a href="https://stackoverflow.com/questions/50039938/hyperledger-fabric-byfn-m-up-doesnt-bring-the-network-up">issue with byfn</a>. I am not sure if these two are related. But obviously neither can I start fabric, nor can I build a network.</p>
  
  <p>I appreciate any help to solve the issue.</p>
  
  <p>Thank you for your attention.</p>