The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 18 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 6:30 pm.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is typically set up to run automatically at regular intervals. For example, a cron job might be used to send out a daily email report or to back up files every night.
A crontab is a text file containing a list of commands that are executed at specified times. The commands in the crontab are executed by the cron daemon, which runs in the background and checks for new entries every minute.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 9 days at 6:30 pm“:
FUN FACT: You can use cron to schedule just about anything!.
You might want to set up a crontab or cron job to run every 9 days at 6:30 pm for several reasons, including:
- Running a backup of all new files every 9 days
- Sending an email to the administrator every 9 days
- Clearing the cache every 9 days
Similar Cron Jobs
You might also want to run a crontab:
- every 7 days
- every 3 days
- every 4 days
- every 2 days
- every 5 days
- every 6 days
- every 7 days at 6:30 pm
- every 3 days at 1:00 pm
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!.
In this article, you learned how to set up a cron job that runs every 9 days at 6:30 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.