The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
* 0-3 * * *
This cron command translates to the following (in Human-Readable format):
“Every minute between 12:00 am and 3:00 am.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at specific intervals. These jobs are usually used for maintenance or automation purposes. For example, a cron job could be set to delete temporary files every week so that they don’t take up space on the server.
A crontab is a file that contains a list of commands to be executed by the cron daemon. The commands in the crontab are executed at the specified times.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every minute between 12:00 am and 3:00 am“:
FUN FACT: If you need to temporarily disable a cron job, you can simply comment out the line in the crontab file that corresponds to that particular task..
You might want to set up a crontab or cron job to run every minute between 12:00 am and 3:00 am for several reasons, including:
- A script to populate a database with fresh data
- A script to send out nightly emails
- A backup script
Similar Cron Jobs
You might also want to run a crontab:
- every 3 minutes
- every 26 minutes
- every 25 minutes
- every minute
- every 8 minutes
- every minute between 5:00 pm and 10:00 pm
- every minute between 7:00 am and 4:00 pm
- every minute between 7:00 am and 2:00 pm
FUN FACT: Cron jobs are named after the Greek god of time, Chronos – so now you know where the name comes from!.
In this article, you learned how to set up a cron job that runs every minute between 12:00 am and 3:00 am. Please share this page with friends and colleagues if you find it useful.
If you have any questions, please don’t hesitate to comment below.
If you are looking for cron jobs that run at certain minutes, hours, days, weekdays, or months, or if you are looking for miscellaneous cron jobs, then check out our relevant sections, or visit our crontab cheat sheet for a list of hundreds of popular cron jobs.