The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 0 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 12:00 am.”
What is a Cron Job & Crontab?
A cron job is a scheduled task that is typically executed by the operating system on a regular basis. Cron jobs are often used to perform maintenance or administrative tasks, such as backing up data or updating software.
A crontab is a file containing commands and instructions for the cron daemon to execute.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 9 days at 12:00 am“:
FUN FACT: One common use for cron jobs is to send out email reminders or notifications based on certain events (such as an upcoming deadline)..
You might want to set up a crontab or cron job to run every 9 days at 12:00 am for several reasons, including:
- Sending a reminder email every 9 days
- Checking for updates on a website every 9 days
- Running a backup every 9 days
Similar Cron Jobs
You might also want to run a crontab:
- every 6 days
- every 7 days
- every 8 days
- every 9 days
- every 4 days
- every 5 days
- every 2 days at 9:00 pm
- every 1 day at 8:30 am
FUN FACT: Cron is typically used for things like system maintenance tasks, running backups etc..
In this article, you learned how to set up a cron job that runs every 9 days at 12:00 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.