title: Cron job is not triggered on Ubuntu VM
body: <h1>Ubuntu</h1>
  
  <p>In my Ubuntu VM, I have configured a cronjob </p>
  
  <p><strong>cat /var/spool/cron/crontabs/*</strong></p>
  
  <pre><code>MAILTO="myemail@gmail.com"
  * * * * * python /home/forge/web-app/database/backup_mysql.py
  </code></pre>
  
  <p>I checked <code>pgrep cron</code> I got number printing out fine. </p>
  
  <hr>
  
  <p>It been 5 mins now, I don't see any email send to me. 
  I don't see any backup file is being generated. </p>
  
  <p>I have a feeling that this cronjob never got run. </p>
  
  <p>How do I debug this ? </p>
  
  <p><strong>Do I need to restart some kind of service ?</strong> </p>