The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 20 */9 * *
This cron command translates to the following (in Human-Readable format):
“Every 9 days at 8:30 pm.”
What is a Cron Job & Crontab?
A cron job is a scheduled task that is typically executed by the server in order to automate certain processes or tasks. For example, a cron job could be set up to automatically backup a database every night at 2am.
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 9 days at 8:30 pm“:
FUN FACT: Cron is typically used for things like system maintenance tasks, running backups etc..
You might want to set up a crontab or cron job to run every 9 days at 8:30 pm for several reasons, including:
- Scheduling a backup to run every 9 days
- Sending out a report every 9 days
- Running a maintenance script every 9 days
Similar Cron Jobs
You might also want to run a crontab:
- every 9 days
- every 7 days
- every 2 days
- every 8 days
- every 1 day at 9:30 pm
- every 2 days at 5:30 pm
- every 6 days at 3:30 am
FUN FACT: A common use for cron jobs is to generate periodic reports – for example, you could set up a cron job to automatically generate and send out a report on website traffic statistics every week..
In this article, you learned how to set up a cron job that runs every 9 days at 8:30 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.