title: How to create md5sum for new files
body: <p>We've created a folder in my dad's computer for everyone in the family to deposit and share their photos and videos.</p>
  
  <pre><code>Example of directories:
  /Family_Photo/Penguins/2017 09 02/
  /Family_Photo/East Beach/2017 10 11/Seaside/
  /Family_Photo/East Beach/2017 10 11/Games/
  </code></pre>
  
  <p>Using md5deep, I am able to create a complete list of checksum for all the files in all subdirectories</p>
  
  <pre><code>md5deep -r /Family_Photo/ &gt; /Family_Photo/md5sum.log
  </code></pre>
  
  <p>Instead of every time regenerating the complete md5 checksum for all (newly added and existing) files, </p>
  
  <p>How can I create a bash script to automatically detect any files that has not been md5 before and generate the checksum for these new files and append them the original md5sum.log</p>