The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
*/20 * * * *
This cron command translates to the following (in Human-Readable format):
“Every 20 minutes.”
What is a Cron Job & Crontab?
Crontab files are typically stored in the /etc/crontab file, but they can also be stored in individual user’s home directories. To edit your own crontab file, you can use the command “crontab -e”. This will open up the file in your default text editor.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 20 minutes“:
FUN FACT: When editing your crontab, it is important to use a text editor that supports Unix-style line endings (LF), as opposed to Windows-style line endings (CRLF)..
You might want to set up a crontab or cron job to run every 20 minutes for several reasons, including:
- Run a backup every 20 minutes
- Perform maintenance tasks every 20 minutes
- Check for new data every 20 minutes
- Refresh caches every 20 minutes
Similar Cron Jobs
You might also want to run a crontab:
- every 8 minutes
- every 27 minutes
- every 17 minutes
- every 12 minutes
- every 9 minutes
- every 16 minutes
- every minute between 5:00 pm and 10:00 pm
- every minute between 2:00 am and 11:00 pm
FUN FACT: Cron jobs are named after the Greek god Chronos, who represents time itself..
In this article, you learned how to set up a cron job that runs every 20 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 crontab cheat sheet for a list of hundreds of popular cron jobs.