The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
*/27 * * * *
This cron command translates to the following (in Human-Readable format):
“Every 27 minutes.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specific time or interval. Cron jobs are commonly used to automate system maintenance or administration tasks, such as running backups or sending emails.
Each user has their own crontab file, and the commands in this file are only executed by that particular user. The file contains instructions for the cron daemon. To edit your crontab file, you can use the crontab command.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 27 minutes“:
FUN FACT: When troubleshooting issues with cron jobs, it can be helpful to run them manually from the command line – this will allow you to see any error messages that might be generated..
You might want to set up a crontab or cron job to run every 27 minutes for several reasons, including:
- Running a backup every 27 minutes
- Checking for new messages every 27 minutes
- Refreshing data from an external API every 27 minutes
- Generating reports based on usage data every 27 minutes
Similar Cron Jobs
You might also want to run a crontab:
- every 5 minutes
- every 28 minutes
- every 27 minutes
- every 17 minutes
- every 21 minutes
- every minute between 3:00 am and 5:00 am
- every minute between 6:00 am and 9:00 pm
- every minute between 9:00 am and 2:00 pm
FUN FACT: Cron is one of the most powerful tools available on a Linux system – use it wisely!.
In this article, you learned how to set up a cron job that runs every 27 minutes. 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 cron job cheat sheet for a list of hundreds of popular cron jobs.