The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 1 */4 * *
This cron command translates to the following (in Human-Readable format):
“Every 4 days at 1:30 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. This can be used to automate tasks such as running backups, sending emails, or running system maintenance scripts.
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 1:30 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..
You might want to set up a crontab or cron job to run every 4 days at 1:30 am for several reasons, including:
- Run a backup of the system every 4 days at 1:30 am
- Delete temporary files every 4 days at 1:30 am
- Send out a report every 4 days at 1:30 am
Similar Cron Jobs
You might also want to run a crontab:
- every 6 days
- every 2 days
- every 1 day
- every 4 days
- every 1 day at 2:00 pm
- every 10 days at 5:00 pm
- every 10 days at 4:00 pm
FUN FACT: Cron jobs are often used to perform regular maintenance tasks, such as running backups or sending out reports..
In this article, you learned how to set up a cron job that runs every 4 days at 1:30 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.