Cron Job Every 1 Hour At 30 Minutes Past The Hour (Crontab)

This page will help you quickly and easily set up a cron job to run every 1 hour at 30 minutes past the hour.

The Cron Job/Crontab

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

30 * * * *

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

“Every 1 hour at 30 minutes past the hour.”

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 automating 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.

Cron Fields

Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 1 hour at 30 minutes past the hour“:

  • Field 1: (30) indicates that the task will be run at minute 30.
  • Field 2: (*) indicates that the task will be run every hour.
  • 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: One common use for cron jobs is to send out email reminders or notifications based on certain events (such as an upcoming deadline)..

    Use Cases

    You might want to set up a crontab or cron job to run every 1 hour at 30 minutes past the hour for several reasons, including:

    • Checking if a website is accessible
    • Sending an email to remind the user of something
    • Generating a report
    • Updating data

    Similar Cron Jobs

    You might also want to run a crontab:

    FUN FACT: If you want to edit your personal crontab, just type: “crontab -e” at the command prompt..

    Wrapping Up

    In this article, you learned how to set up a cron job that runs every 1 hour at 30 minutes past the hour. 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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