The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 19 */3 * *
This cron command translates to the following (in Human-Readable format):
“Every 3 days at 7:30 pm.”
What is a Cron Job & Crontab?
The crontab is a file that contains instructions for the cron daemon. The crontab is typically edited using the crontab command.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 3 days at 7:30 pm“:
FUN FACT: Cron is one of the most powerful tools available on a Linux system – use it wisely!.
You might want to set up a crontab or cron job to run every 3 days at 7:30 pm for several reasons, including:
- A user wants to be reminded every 3 days to take their medication at 7:30 pm.
- A cron job is set up to run a script every 3 days that deletes temporary files that are more than 3 days old.
- A cron job is set up to run a backup of a database every 3 days at 7:30 pm.
Similar Cron Jobs
You might also want to run a crontab:
- every 6 days
- every 3 days
- every 2 days
- every 1 day
- every 10 days
- every 8 days
- every 6 days at 7:00 pm
- every 10 days at 12:30 am
FUN FACT: If a cron job is not properly configured, it might never execute – so make sure you double-check your settings before setting one up!.
In this article, you learned how to set up a cron job that runs every 3 days at 7:30 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 cron job cheat sheet for a list of hundreds of popular cron jobs.