title: source command not found in sh shell
body: <p>I have a script that uses <code>sh</code> shell. I get an error in the line that uses the <code>source</code> command. It seems <code>source</code> is not included in my <code>sh</code> shell. </p>
  
  <p>If I explicitly try to run <code>source</code> from shell I get:</p>
  
  <pre><code>sh: 1: source: not found
  </code></pre>
  
  <p>Should I somehow install "source"? Do I have a wrong version of <code>sh</code>?</p>