The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 22 */4 * *
This cron command translates to the following (in Human-Readable format):
“Every 4 days at 10:00 pm.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at a specific interval. For example, a cron job can be set to run every day at midnight in order to update a database or send out nightly emails. Cron jobs are typically used for maintenance tasks that need to be performed on a regular basis.
A crontab (also known as a “cron table”) is a file that contains a list of commands that are executed at specified times.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 days at 10:00 pm“:
FUN FACT: Cron jobs are used to schedule commands or scripts to run automatically at a specified time and date..
You might want to set up a crontab or cron job to run every 4 days at 10:00 pm for several reasons, including:
- Sending out a reminder email to users every 4 days
- Backing up data every 4 days
- Running a script to generate reports every 4 days
Similar Cron Jobs
You might also want to run a crontab:
- every 3 days
- every 9 days
- every 8 days
- every 1 day
- every 4 days
- every 9 days at 3:00 am
- every 4 days at 9:00 pm
- every 6 days at 1:30 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 4 days at 10:00 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.