The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 23 */4 * *
This cron command translates to the following (in Human-Readable format):
“Every 4 days at 11:30 pm.”
What is a Cron Job & Crontab?
A cron job is a scheduled task that is typically executed automatically at a predetermined time or interval. Cron jobs are commonly used to perform system maintenance or administrative tasks, such as backing up data or generating reports.
A crontab is a file that contains commands to be run at specified times. The crontab file is typically edited using the crontab command, which can be used to list, edit, or delete the contents of the file.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 days at 11:30 pm“:
FUN FACT: Cron jobs are automated processes that run on a schedule..
You might want to set up a crontab or cron job to run every 4 days at 11:30 pm for several reasons, including:
- To run a backup of all user data every 4 days
- To send out a reminder email to users every 4 days
- To generate reports on system usage every 4 days
Similar Cron Jobs
You might also want to run a crontab:
- every 10 days
- every 6 days
- every 2 days
- every 8 days
- every 1 day
- every 9 days
- every 5 days at 1:30 pm
- every 8 days at 3:30 pm
- every 8 days at 8:30 am
FUN FACT: If you want to see what commands are scheduled in your crontab, type: “crontab -l”.
In this article, you learned how to set up a cron job that runs every 4 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.