The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 8 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 8:30 am.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specified time or interval. Cron jobs are commonly used to automate system maintenance or administration tasks, such as running backups or sending emails.
A crontab (also known as a “cron table”) is a file that contains a list of commands that are executed at specified times.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 9 days at 8:30 am“:
FUN FACT: If a cron job is not properly configured, it might never execute – so make sure you double-check your settings before setting one up!.
You might want to set up a crontab or cron job to run every 9 days at 8:30 am for several reasons, including:
- Scheduling a backup to run every 9 days
- Sending a report of system usage statistics every 9 days
- Checking for updates to a software package every 9 days
- Running a virus scan on the server every 9 days
Similar Cron Jobs
You might also want to run a crontab:
- every 7 days
- every 1 day
- every 2 days
- every 10 days
- every 5 days at 7:30 pm
- every 4 days at 2:00 pm
- every 3 days at 7:00 pm
FUN FACT: If you need to delete a cron job, simply remove the corresponding line from the crontab file and save your changes..
In this article, you learned how to set up a cron job that runs every 9 days at 8:30 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.