What is Cron Job?

By | July 25, 2017

A cron job is a Linux command for scheduling a task to be executed sometime in the future. This is normally used to schedule a job that is executed periodically – for example, to send out a notice every morning. Some scripts, such as Drupal, WHMCS may require you to set up a cron job to perform certain functions.

 

For most cron jobs, there are three components present:

 

  1. The script that is to be called or executed.
  2. The command that executes the script on a reoccurring basis.  This is typically set in the cPanel.
  3. The action or output of the script, which depends on what the script being called, does.  Frequently, scripts called as a cron job modify files or databases; however they can perform other tasks that do not modify data on the server, like sending out email notifications.

Most scripts that require the use of a cron job will give you specific instructions on what needs to be setup, frequently giving examples.

 

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