The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 11 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 11:30 am.”
What is a Cron Job & Crontab?
A cron job is a Linux utility used for scheduling the execution of commands or scripts at a specified time and date. Cron is typically used for system maintenance or administration, such as running backups or log rotation.
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.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 9 days at 11:30 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..
You might want to set up a crontab or cron job to run every 9 days at 11:30 am for several reasons, including:
- Trigger a backup at 11:30 am every 9 days
- Run a health check at 11:30 am every 9 days
- Notify a user at 11:30 am every 9 days
Similar Cron Jobs
You might also want to run a crontab:
FUN FACT: Cron jobs are named after the Greek god of time, Chronos – so now you know where the name comes from!.
In this article, you learned how to set up a cron job that runs every 9 days at 11:30 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 cron job cheat sheet for a list of hundreds of popular cron jobs.