The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 0 */8 * *
This cron command translates to the following (in Human-Readable format):
“Every 8 days at 12:30 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.
Crontab files are typically stored in the /etc/crontab file, but they can also be stored in individual user’s home directories. To edit your own crontab file, you can use the command “crontab -e”. This will open up the file in your default text editor.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 8 days at 12:30 am“:
FUN FACT: If you want to see what commands are scheduled in your crontab, type: “crontab -l”.
You might want to set up a crontab or cron job to run every 8 days at 12:30 am for several reasons, including:
- updating a cache
- sending out a report or notification
- checking for new data from an external source
- running maintenance tasks
Similar Cron Jobs
You might also want to run a crontab:
- every 6 days
- every 2 days
- every 10 days
- every 9 days
- every 1 day
- every 5 days at 9:00 pm
- every 10 days at 4:30 pm
FUN FACT: Cron jobs are named after the Greek god Chronos, who represents time itself..
In this article, you learned how to set up a cron job that runs every 8 days at 12:30 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.