The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 15 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 3:30 pm.”
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. This can be used to automate tasks such as running backups, sending emails, or running system maintenance scripts.
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 3:30 pm“:
FUN FACT: Cron is typically used for things like system maintenance tasks, running backups etc..
You might want to set up a crontab or cron job to run every 9 days at 3:30 pm for several reasons, including:
- Sending a reminder email to a group of people every 9 days
- Backing up files to an external drive every 9 days
- Running a script that cleans up temporary files every 9 days
Similar Cron Jobs
You might also want to run a crontab:
- every 10 days
- every 7 days
- every 1 day
- every 4 days
- every 9 days
- every 2 days at 4:00 am
- every 3 days at 11:30 pm
FUN FACT: Cron jobs are stored in a file called “crontab”, which is short for “cron table”..
In this article, you learned how to set up a cron job that runs every 9 days at 3:30 pm. 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.