The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
* 9-11 * * *
This cron command translates to the following (in Human-Readable format):
“Every minute between 9:00 am and 11:00 am.”
What is a Cron Job & Crontab?
A crontab is a file that contains a list of commands that are to be executed at specified times. The commands in the crontab are executed by the cron daemon, which runs in the background.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every minute between 9:00 am and 11:00 am“:
FUN FACT: Cron is typically used for things like system maintenance tasks, running backups etc..
You might want to set up a crontab or cron job to run every minute between 9:00 am and 11:00 am for several reasons, including:
- Sending a wake-up call to a user at 9:00 am
- Sending an email to a user at 9:01 am
- Running a backup script at 9:02 am
- Checking for new messages from a user at 9:03 am
Similar Cron Jobs
You might also want to run a crontab:
- every 25 minutes
- every 3 minutes
- every 5 minutes
- every 22 minutes
- every 11 minutes
- every 15 minutes
- every minute between 1:00 am and 9:00 pm
- every minute between 2:00 am and 4:00 am
- every minute between 1:00 am and 7:00 pm
FUN FACT: Cron is one of the most versatile tools in a Linux administrator’s toolbox..
In this article, you learned how to set up a cron job that runs every minute between 9:00 am and 11:00 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.