The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 0 31 */4 *
This cron command translates to the following (in Human-Readable format):
“Every 4 months on day 31 of the month.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at specific intervals. This can be anything from running a script every hour to backing up a database every day. Cron jobs are typically used for maintenance or automation purposes.
A crontab is a file that contains a list of commands to be executed by the cron daemon. The commands in the crontab are executed 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 4 months on day 31 of the month“:
FUN FACT: If you want to edit your personal crontab, just type: “crontab -e” at the command prompt..
You might want to set up a crontab or cron job to run every 4 months on day 31 of the month for several reasons, including:
- To update a subscription service
- To backup files
- To run system maintenance tasks
Similar Cron Jobs
You might also want to run a crontab:
- every 5 months
- every 2 months
- every 1 month
- every 3 months
- every 4 months
- every 4 months on day 16 of the month
- every 2 months on day 30 of the month
FUN FACT: Cron is one of the most powerful tools available on a Linux system – use it wisely!.
In this article, you learned how to set up a cron job that runs every 4 months on day 31 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 cron job cheat sheet for a list of hundreds of popular cron jobs.