title: Cron filename with date is passing Y_m_d not actual date
body: <p>Using cron to backup mysql to a folder everyday. So tried to schedule cron with below code in linux server. <a href="https://stackoverflow.com/questions/6578533/daily-database-backup-using-cron-job">related post</a></p>
  
  <pre><code>0 0 * * * &lt;username&gt; mysqldump -u&lt;mysql username&gt; -p&lt;mysql password&gt; &lt;database name&gt; &gt; /home/&lt;username&gt;/Db_BackUp/expense_$( date +"\℅Y_\℅m_\℅d" ).sql
  </code></pre>
  
  <p>above cron is working but generated file name is like</p>
  
  <pre><code>expense_\.Y_\.m_\.d.sql
  </code></pre>
  
  <blockquote>
    <p>I need cron to create filename as <code>expense_2016_04_05.sql</code></p>
  </blockquote>
  
  <p>how to do this in cron?</p>
  
  <p><a href="https://stackoverflow.com/questions/4565194/issue-with-mysql-backup-in-cron?rq=1">related answer from SO Post</a></p>
  
  <p>addition info about cron restart <a href="https://stackoverflow.com/questions/10193788/restarting-cron-after-changing-crontab-file?rq=1">SO Post</a></p>