Cron jobs are scheduled tasks that take place at predefined times or intervals on the server. Often, a cron job is a series of simple tasks executed from a script file. Cron jobs can be a very resourceful tool as they can be set to run by the minute, hour, day of the week, day of the month, month or any combination of these.
For example, you could set a cron job to delete temporary files every week so that your disk space is not being used up by those files.
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