The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
* 7-21 * * *
This cron command translates to the following (in Human-Readable format):
“Every minute between 7:00 am and 9:00 pm.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specific time or interval. Cron is a Linux utility that enables users to schedule tasks to be executed automatically at a specified time or interval. A cron job is typically used to automate system maintenance or administration tasks, such as running backups or sending emails.
Crontab files are stored in the “/etc/cron*” directories on most Linux systems. Each user has their own crontab file, and there is also a system-wide crontab file that can be used to schedule system tasks.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every minute between 7:00 am and 9:00 pm“:
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 7:00 am and 9:00 pm for several reasons, including:
- A daily backup at 8:00 pm
- Checking for new email every 15 minutes
- A weekly report on Mondays at 9:00 am
Similar Cron Jobs
You might also want to run a crontab:
- every 14 minutes
- every 23 minutes
- every 18 minutes
- every 19 minutes
- every minute between 11:00 am and 2:00 pm
- every minute between 8:00 am and 12:00 pm
- every minute between 12:00 am and 6:00 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 7:00 am and 9:00 pm. 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.