The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 2 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 2:30 am.”
What is a Cron Job & Crontab?
In computing, a cron job is a time-based task that is set to run at certain predetermined times or intervals. A cron job can be used to schedule anything from basic tasks like running backups to more complex tasks like sending out email alerts or syncing files between servers. Cron jobs are typically used for maintenance or administrative tasks that need to be performed on a regular basis.
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 2:30 am“:
FUN FACT: Cron jobs are stored in a file called “crontab”, which is short for “cron table”..
You might want to set up a crontab or cron job to run every 9 days at 2:30 am for several reasons, including:
- Run a system backup
- Update a blog
- Check for software updates
- Generate reports
Similar Cron Jobs
You might also want to run a crontab:
- every 6 days
- every 1 day
- every 9 days
- every 4 days
- every 8 days
- every 2 days
- every 8 days at 2:00 pm
- every 7 days at 11:30 pm
- every 5 days at 8:30 am
FUN FACT: Cron is one of the most powerful tools available on a Linux system – use it wisely!.
In this article, you learned how to set up a cron job that runs every 9 days at 2:30 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 cron job cheat sheet for a list of hundreds of popular cron jobs.