The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 2 */4 * *
This cron command translates to the following (in Human-Readable format):
“Every 4 days at 2:00 am.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specific time or interval. Cron is a Linux utility that enables users to schedule tasks to be executed automatically at a specified time or interval. A cron job is typically used to automate system maintenance or administration tasks, such as running backups or sending emails.
A crontab is a text file that contains a list of commands to be run at specified times. The commands in the crontab are executed by the cron daemon, which runs on most Unix-like systems.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 days at 2:00 am“:
FUN FACT: You can use cron to schedule just about anything!.
You might want to set up a crontab or cron job to run every 4 days at 2:00 am for several reasons, including:
- Run a script to update a database every 4 days
- Sync data from an external source every 4 days
- Generate a report every 4 days
- Send out a notification every 4 days
Similar Cron Jobs
You might also want to run a crontab:
- every 1 day
- every 8 days
- every 10 days
- every 3 days
- every 9 days
- every 6 days at 3:00 pm
- every 1 day at 2:30 am
FUN FACT: When troubleshooting issues with cron jobs, it can be helpful to run them manually from the command line – this will allow you to see any error messages that might be generated..
In this article, you learned how to set up a cron job that runs every 4 days at 2:00 am. 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.