title: Script to replace tokens with values mentioned in properties file
body: <p>I have a file values.properties which contain data, like:</p>
  
  <pre><code>$ABC=10
  $XYZ=20
  </code></pre>
  
  <p>I want to create a shell script that will take each element one by one from above file.</p>
  
  <p>Say $ABC, then go to file ABC.txt &amp; replace the value of $ABC with 10.
  Similarly, then go to file XYZ.txt and replace $XYZ with 20.</p>