The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 23 */8 * *
This cron command translates to the following (in Human-Readable format):
“Every 8 days at 11:30 pm.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specific time or interval. Cron jobs are typically used for automating tasks, such as running backups or sending emails.
Crontab is a file that contains instructions for the cron daemon, which is a program that executes commands at specified intervals. Crontab files are typically edited with the crontab command, which allows users to create, edit, and delete their own crontab files.
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 pm“:
FUN FACT: Cron jobs can be set up to run at specific times, or they can be configured to run periodically (e.g., every hour)..
You might want to set up a crontab or cron job to run every 8 days at 11:30 pm for several reasons, including:
- Backup a database
- Generate a report
- Send out a customer satisfaction survey
- Clean up temporary files
Similar Cron Jobs
You might also want to run a crontab:
- every 7 days
- every 10 days
- every 1 day
- every 5 days
- every 3 days
- every 9 days at 9:00 am
- every 3 days at 4:00 pm
FUN FACT: Cron is typically used for things like system maintenance tasks, running backups etc..
In this article, you learned how to set up a cron job that runs every 8 days at 11:30 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.