Cron Job Every Hour Between 1:00 am & 4:00 am (Crontab)

This page will help you quickly and easily set up a cron job to run every hour between 1:00 am and 4:00 am.

The Cron Job/Crontab

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

0 1-4 * * *

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

“Every hour between 1:00 am and 4:00 am.”

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 typically used for system maintenance or administration tasks, such as backing up data or updating software.

A crontab is a text file containing a list of commands that are executed at specified times. The commands in the crontab are executed by the cron daemon, which runs in the background and checks for new entries every minute.

Cron Fields

Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every hour between 1:00 am and 4:00 am“:

  • Field 1: (0) indicates that the task will be run at minute 0.
  • Field 2: (1-4) indicates that the task will be run between hours 1 and 4 (1 am to 4 am).
  • Field 3: (*) indicates that the task will be run every day of the month.
  • 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: If you need to delete a cron job, simply remove the corresponding line from the crontab file and save your changes..

    Use Cases

    You might want to set up a crontab or cron job to run every hour between 1:00 am and 4:00 am for several reasons, including:

    • Sending a wake-up call to employees who have the early shift
    • Running a backup script
    • Generating reports that need to be ready for the start of the workday
    • Freshening up data cache that is used by morning users

    Similar Cron Jobs

    You might also want to run a crontab:

    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)..

    Wrapping Up

    In this article, you learned how to set up a cron job that runs every hour between 1:00 am and 4:00 am. 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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