The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 7-21 * * *
This cron command translates to the following (in Human-Readable format):
“Every hour between 7:00 am and 9:00 pm.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specific time or interval. Cron is a Linux utility that enables users to schedule tasks to be executed automatically at a specified time or interval. A cron job is typically used to automate system maintenance or administration tasks, such as running backups or sending emails.
Crontab is a file that contains instructions for the cron daemon, which is a program that executes commands at specified intervals. Crontab files are typically edited with the crontab command, which allows users to create, edit, and delete their own crontab files.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every hour between 7:00 am and 9:00 pm“:
FUN FACT: Cron is typically used for things like system maintenance tasks, running backups etc..
You might want to set up a crontab or cron job to run every hour between 7:00 am and 9:00 pm for several reasons, including:
- Checking if a server is up and running
- Sending out daily or weekly reports
- Performing regular backups
- Running a security scan
Similar Cron Jobs
You might also want to run a crontab:
- every 4 hours
- every 11 hours
- every 5 hours
- every 12 hours
- every 5 hours at 40 minutes past the hour
- every hour between 1:00 pm and 7:00 pm
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)..
In this article, you learned how to set up a cron job that runs every hour between 7:00 am and 9:00 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.