Cron Job Every 4 Months On Day 9 Of The Month (Crontab)

This page will help you quickly and easily set up a cron job to run every 4 months on day 9 of the month.

The Cron Job/Crontab

To have your task run at this frequency, use the following cron:

0 0 9 */4 *

This cron command translates to the following (in Human-Readable format):

“Every 4 months on day 9 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.

A crontab is a file containing commands and instructions for the cron daemon to execute. The crontab is used to schedule jobs (commands or shell scripts) to run periodically at certain times or dates.

Cron Fields

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 9 of the month“:

  • Field 1: (0) indicates that the task will be run at minute 0.
  • Field 2: (0) indicates that the task will be run at hour 0 (12 am).
  • Field 3: (9) indicates that the task will be run on day 9 of every month.
  • Field 4: (*/4) indicates that the task will be run every 4 months.
  • Field 5: (*) indicates that the task will be run every day of the week.
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    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!.

    Use Cases

    You might want to set up a crontab or cron job to run every 4 months on day 9 of the month for several reasons, including:

    • Backup a database
    • Generate reports
    • Sync data between servers
    • Send out monthly newsletters
    • Update software

    Similar Cron Jobs

    You might also want to run a crontab:

    FUN FACT: If you need to temporarily disable a cron job, you can simply comment out the line in the crontab file that corresponds to that particular task..

    Wrapping Up

    In this article, you learned how to set up a cron job that runs every 4 months on day 9 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.

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