The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 4 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 4:30 am.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at a specific time or interval. These jobs are usually used for automating tasks, such as running backups or sending emails. Cron is the name of the program that enables users to schedule these jobs.
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 4:30 am“:
FUN FACT: Cron jobs can be used to automate just about any task that needs to be performed regularly – so get creative and see what you can come up with!.
You might want to set up a crontab or cron job to run every 9 days at 4:30 am for several reasons, including:
- Running a backup every 9 days
- Checking for updates to a software package every 9 days
- Sending out a reminder email every 9 days
Similar Cron Jobs
You might also want to run a crontab:
- every 4 days
- every 6 days
- every 5 days
- every 8 days
- every 7 days
- every 7 days at 11:30 pm
- every 3 days at 1:00 am
FUN FACT: Cron jobs can be set up to run at specific times, or they can be configured to run periodically (e.g., every hour)..
In this article, you learned how to set up a cron job that runs every 9 days at 4:30 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 crontab cheat sheet for a list of hundreds of popular cron jobs.