CRON JOB

A cron job is a script that runs on a web server to perform maintenance tasks on regularly scheduled intervals.

web servers need to do weekly, daily, or even hourly, maintenance tasks. This helps them stay tartar free.

Cron jobs can do all sort of things. They can backup files or databases, they can clean up data, they can send emails, they can transfer data from one place to another, they can update information from external sources.
One of the most common cron jobs is a script that regularly logs onto the Internet and downloads all your email.

The only thing that all cron jobs share is that they are scripts that are run automatically on a set schedule.

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