The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 11 */8 * *
This cron command translates to the following (in Human-Readable format):
“Every 8 days at 11:30 am.”
What is a Cron Job & Crontab?
A crontab is a table or list of commands that are scheduled to run at specified times. The commands in a crontab file (also called a “cron table”) are normally executed by the cron daemon, which runs in the background and executes these commands automatically.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 8 days at 11:30 am“:
FUN FACT: Cron is one of the most versatile tools in a Linux administrator’s toolbox..
You might want to set up a crontab or cron job to run every 8 days at 11:30 am for several reasons, including:
- Sending a daily email report
- Generating a weekly sales report
- Backing up data to remote storage every 8 days
Similar Cron Jobs
You might also want to run a crontab:
- every 7 days
- every 4 days
- every 9 days
- every 6 days
- every 5 days
- every 3 days
- every 5 days at 10:30 pm
- every 1 day at 1:00 pm
- every 9 days at 6:00 pm
FUN FACT: If you want to edit your personal crontab, just type: “crontab -e” at the command prompt..
In this article, you learned how to set up a cron job that runs every 8 days at 11:30 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.