The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 0 31 */6 *
This cron command translates to the following (in Human-Readable format):
“Every 6 months on day 31 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 is a Linux utility that enables users to schedule tasks to be executed automatically at a specified time or interval. A cron job is typically used to automate system maintenance or administration tasks, such as running backups or sending emails.
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 6 months on day 31 of the month“:
FUN FACT: Cron jobs are stored in a file called “crontab”, which is short for “cron table”..
You might want to set up a crontab or cron job to run every 6 months on day 31 of the month for several reasons, including:
- To send a reminder to users every 6 months to renew their subscription
- To generate reports every 6 months on the 31st day of the month
- To backup data every 6 months on the 31st day of the month
Similar Cron Jobs
You might also want to run a crontab:
- every 4 months
- every 1 month
- every 6 months
- every 5 months
- every 3 months
- every 2 months
- every 3 months on day 20 of the month
- every 4 months on day 22 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 6 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.