Cron Job Every 3 Days At 5:30 pm (Crontab)

This page will help you quickly and easily set up a cron job to run every 3 days at 5:30 pm.

The Cron Job/Crontab

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

30 17 */3 * *

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

“Every 3 days at 5:30 pm.”

What is a Cron Job & Crontab?

A cron job is a Linux utility used for scheduling the execution of commands or scripts at a specified time and date. Cron is typically used for system maintenance or administration, such as running backups or log rotation.

A crontab is a file containing commands and instructions for the cron daemon to execute.

Cron Fields

Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 3 days at 5:30 pm“:

  • Field 1: (30) indicates that the task will be run at minute 30.
  • Field 2: (17) indicates that the task will be run at hour 17 (5 pm).
  • Field 3: (*/3) indicates that the task will be run every 3 days.
  • Field 4: (*) indicates that the task will be run every month.
  • Field 5: (*) indicates that the task will be run every day of the week.
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    FUN FACT: When configuring a cron job, you can specify the minute, hour, day of the month, month and day of the week when it should run – this gives you a lot of flexibility in terms of when your task will be performed automatically!.

    Use Cases

    You might want to set up a crontab or cron job to run every 3 days at 5:30 pm for several reasons, including:

    • A daily backup that needs to happen every three days
    • A cron job that sends out a reminder email every three days
    • A cron job that checks for updates to a software every three days

    Similar Cron Jobs

    You might also want to run a crontab:

    FUN FACT: You can use cron to schedule just about anything!.

    Wrapping Up

    In this article, you learned how to set up a cron job that runs every 3 days at 5:30 pm. 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.

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