How to create a relative linux crontab in bash: NOW (date) + 24 hrs
<p>I need a way to create an entry on the crontab that executes a script only once in 24h.  </p>

<p>Steps:</p>

<ul>
<li>Run a bash script to configure a crontab to run a script in 24h (with command <code>date</code>?). This will run only ONCE 24 hs after .</li>
<li>24h later the script runs.</li>
<li>At the end of the script execution, the crontab must be left clean. This means to remove the entry from the crontab. I don´t want to pollute the crontab with deprecated entries.</li>
</ul>