The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
40 */7 * * *
This cron command translates to the following (in Human-Readable format):
“Every 7 hours at 40 minutes past the hour.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at a specific interval. For example, a cron job could be set to run every day at midnight in order to update a database or send out nightly emails. Cron jobs are typically used for maintenance tasks that need to be performed regularly.
Crontab files are stored in the “/etc/cron*” directories on most Linux systems. Each user has their own crontab file, and there is also a system-wide crontab file that can be used to schedule system tasks.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 7 hours at 40 minutes past the hour“:
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!.
You might want to set up a crontab or cron job to run every 7 hours at 40 minutes past the hour for several reasons, including:
- Automatic backup of a database
- Sending out a daily email report
- Refreshing data from an external API
- Running a nightly script to clean up temporary files
Similar Cron Jobs
You might also want to run a crontab:
- every 8 hours
- every 2 hours
- every 7 hours
- every 4 hours
- every 1 hour
- every 9 hours
- every hour between 9:00 pm and 11:00 pm
- every hour between 12:00 am and 7:00 am
- every hour between 3:00 pm and 7:00 pm
FUN FACT: Cron jobs can be used to automate just about any task that needs to be performed regularly – so get creative and see what you can come up with!.
In this article, you learned how to set up a cron job that runs every 7 hours at 40 minutes past the hour. 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.