The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
10 */12 * * *
This cron command translates to the following (in Human-Readable format):
“Every 12 hours at 10 minutes past the hour.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specific time or interval. Cron jobs are typically used for system maintenance or administration tasks, such as backing up data or updating software.
Crontab is a file that contains commands and instructions for the cron daemon to execute. The crontab file is usually located in the /etc/cron directory. Each user on a system can have their own crontab file. The commands in the crontab files are executed by the cron daemon at the specified times.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 12 hours at 10 minutes past the hour“:
FUN FACT: One common use for cron jobs is to send out email reminders or notifications based on certain events (such as an upcoming deadline)..
You might want to set up a crontab or cron job to run every 12 hours at 10 minutes past the hour for several reasons, including:
- Updating statistics that are used to generate graphs
- Pulling data from an API
- Backing up a database
- Sending out a daily email report
Similar Cron Jobs
You might also want to run a crontab:
- every 4 hours
- every 6 hours
- every 2 hours
- every 12 hours
- every 3 hours
- every 1 hour
- every hour between 7:00 am and 7:00 pm
- every hour between 2:00 pm and 7:00 pm
FUN FACT: If you need to delete a cron job, simply remove the corresponding line from the crontab file and save your changes..
In this article, you learned how to set up a cron job that runs every 12 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 cron job cheat sheet for a list of hundreds of popular cron jobs.