The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 0 13 */4 *
This cron command translates to the following (in Human-Readable format):
“Every 4 months on day 13 of the month.”
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 can 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 on a regular basis.
Crontab is a file that contains instructions for the cron daemon, which is a program that executes commands at specified intervals. Crontab files are typically edited with the crontab command, which allows users to create, edit, and delete their own crontab files.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 months on day 13 of the month“:
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!.
You might want to set up a crontab or cron job to run every 4 months on day 13 of the month for several reasons, including:
- Updating a blog
- Generating monthly reports
- Checking for software updates
- Sending out a newsletter
Similar Cron Jobs
You might also want to run a crontab:
- every 2 months
- every 4 months
- every 5 months
- every 3 months
- every 6 months
- every 4 months on day 15 of the month
- every 5 months on day 31 of the month
- every 1 month on day 20 of the month
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..
In this article, you learned how to set up a cron job that runs every 4 months on day 13 of the month. 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.