What is a Cron Job?

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What is a Cron job and what would I use it for?
asked Oct 5, 2014 in Cloud Hosting by rakaluu (730 points)

2 Answers

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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 that the server executes from a script file.


Be careful when you schedule cron jobs. If you set them to run too often, they may slow down your server.

What is a Cron job?

Cron is a time-based job scheduler.
• It’s most commonly used to automate system maintenance or administration.
Cron enables users to schedule jobs to run periodically at certain times or dates.
• This can be a one-time task or can be executed repeatedly.

These are some commands for Crontabs:

• crontab –e Edit your Crontab file, or create one if it doesn’t already exist
• crontab –l Display your Crontab file
• crontab –r Remove your Crontab file
• crontab –v Display the last time you edited your Crontab file

answered Oct 5, 2014 by rakaluu (730 points)
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A Cron job is the Linux equivalent of a Windows Scheduled Task.  Cron comes from the Greek word for time (chronos).

It is often used for running recurring tasks, e.g.backups, or to run background services at intervals.  e.g. sending emails in a batch at a certain time of dey
answered Feb 4, 2015 by wernerhp (970 points)