The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
* 2-4 * * *
This cron command translates to the following (in Human-Readable format):
“Every minute between 2:00 am and 4:00 am.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is typically set up to run automatically at regular intervals. For example, a cron job might be used to send out a daily email report or to back up files every night.
Crontab is a file that contains instructions for the cron daemon. The cron daemon is a program that runs in the background and executes tasks at specified times. The crontab file is used to specify which tasks are to be run and when they are to be run.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every minute between 2:00 am and 4:00 am“:
FUN FACT: A common use for cron jobs is to generate periodic reports – for example, you could set up a cron job to automatically generate and send out a report on website traffic statistics every week..
You might want to set up a crontab or cron job to run every minute between 2:00 am and 4:00 am for several reasons, including:
- Back up data at 2:00, 3:00, and 4:00
- Run a report at 2:15, 3:15, and 4:15
- Sync data to an external server at 2:30, 3:30, and 4:30
Similar Cron Jobs
You might also want to run a crontab:
- every 20 minutes
- every 25 minutes
- every 13 minutes
- every 16 minutes
- every 7 minutes
- every minute between 1:00 pm and 4:00 pm
- every minute between 9:00 am and 11:00 pm
- every minute between 12:00 am and 11:00 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..
In this article, you learned how to set up a cron job that runs every minute between 2:00 am and 4:00 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.