The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
10 */3 * * *
This cron command translates to the following (in Human-Readable format):
“Every 3 hours at 10 minutes past the hour.”
What is a Cron Job & Crontab?
A cron job is a scheduled task that is typically executed by the server in order to automate certain processes or tasks. For example, a cron job could be set up to automatically backup a database every night at 2am.
A crontab is a file that contains instructions for the cron daemon. The cron daemon is a program that runs in the background and executes tasks at specified times. A crontab file typically contains a list of commands, with each command being executed at a specified time.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 3 hours at 10 minutes past the hour“:
FUN FACT: Cron jobs can be set up to run at specific times, or they can be configured to run periodically (e.g., every hour)..
You might want to set up a crontab or cron job to run every 3 hours at 10 minutes past the hour for several reasons, including:
- Checking for updates to a software package
- Deleting temporary files that are no longer needed
- Generating reports
- Sending reminder emails
Similar Cron Jobs
You might also want to run a crontab:
- every 11 hours
- every 8 hours
- every 1 hour
- every 5 hours
- every 3 hours
- every 5 hours at 1 minutes past the hour
- every hour between 7:00 am and 1:00 pm
- every hour between 1:00 am and 11:00 pm
FUN FACT: You can use cron to schedule just about anything!.
In this article, you learned how to set up a cron job that runs every 3 hours at 10 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.