The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 15-18 * * *
This cron command translates to the following (in Human-Readable format):
“Every hour between 3:00 pm and 6:00 pm.”
What is a Cron Job & Crontab?
In computing, a cron job is a time-based task that is set to run at certain predetermined times or intervals. A cron job can be used to schedule anything from basic tasks like running backups to more complex tasks like sending out email alerts or syncing files between servers. Cron jobs are typically used for maintenance or administrative tasks that need to be performed on a regular basis.
A crontab is a file that contains commands to be run at specified times. The crontab file is typically edited using the crontab command, which can be used to list, edit, or delete the contents of the file.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every hour between 3:00 pm and 6:00 pm“:
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!.
You might want to set up a crontab or cron job to run every hour between 3:00 pm and 6:00 pm for several reasons, including:
- A user wants to be notified every hour between 3:00 pm and 6:00 pm of the current weather conditions.
- A server administrator wants a cron job to run every hour between 3:00 pm and 6:00 pm to check for system updates.
- A cron job is set up to run a database backup every hour between 3:00 pm and 6:00 pm.
Similar Cron Jobs
You might also want to run a crontab:
- every 10 hours
- every 8 hours
- every 4 hours
- every 6 hours
- every 7 hours
- every 12 hours
- every hour between 2:00 am and 11:00 pm
- every 7 hours at 10 minutes past the hour
- every hour between 10:00 am and 7:00 pm
FUN FACT: Cron is one of the most powerful tools available on a Linux system – use it wisely!.
In this article, you learned how to set up a cron job that runs every hour between 3:00 pm and 6:00 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.