The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 12 */8 * *
This cron command translates to the following (in Human-Readable format):
“Every 8 days at 12:30 pm.”
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 file that contains a list of commands that are to be executed at specified times. The commands in the crontab are executed by the cron daemon, which runs in the background.
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 pm“:
FUN FACT: Each user on a system can have their own crontab, and commands in them will be executed as that user..
You might want to set up a crontab or cron job to run every 8 days at 12:30 pm for several reasons, including:
- A daily backup that runs every 8 days
- A task that needs to be run every 2 weeks
- Checking for updates to a software package
Similar Cron Jobs
You might also want to run a crontab:
- every 3 days
- every 1 day
- every 10 days
- every 5 days
- every 9 days
- every 8 days at 9:30 am
- every 5 days at 1:00 am
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)..
In this article, you learned how to set up a cron job that runs every 8 days at 12:30 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 cron job cheat sheet for a list of hundreds of popular cron jobs.