The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 0 23 */4 *
This cron command translates to the following (in Human-Readable format):
“Every 4 months on day 23 of the month.”
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 commonly used to automate system maintenance or administration tasks, such as running backups or sending emails.
To create or edit a cron job, users must first open the crontab file using a text editor. The crontab file contains instructions for the cron daemon, which is the program that actually executes the commands specified in the file. Each line in the crontab file represents a single task or command.
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 23 of the month“:
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 4 months on day 23 of the month for several reasons, including:
- To run a script that updates software on the 23rd day of every 4th month
- To send out a monthly newsletter on the 23rd day of every 4th month
- To generate reports on the 23rd day of every 4th month
Similar Cron Jobs
You might also want to run a crontab:
- every 2 months
- every 5 months
- every 3 months
- every 6 months
- every 3 months on day 14 of the month
- every 6 months on day 12 of the month
FUN FACT: If you want to see what commands are scheduled in your crontab, type: “crontab -l”.
In this article, you learned how to set up a cron job that runs every 4 months on day 23 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.