The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 6 */4 * *
This cron command translates to the following (in Human-Readable format):
“Every 4 days at 6:30 am.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at a specific time or interval. These jobs are usually used for automating tasks, such as running backups or sending emails. Cron is the name of the program that enables users to schedule these jobs.
A crontab is a file containing commands and instructions for the cron daemon to execute.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 days at 6:30 am“:
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 6:30 am for several reasons, including:
- The job could be used to run a backup of system data every 4 days.
- The job could be used to send out a report to all users every 4 days.
- The job could be used to generate new statistics every 4 days.
Similar Cron Jobs
You might also want to run a crontab:
- every 10 days
- every 2 days
- every 5 days
- every 3 days
- every 9 days
- every 7 days at 4:30 am
- every 1 day at 1:30 pm
- every 9 days at 8:30 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 6:30 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 cron job cheat sheet for a list of hundreds of popular cron jobs.