The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 20-22 * * *
This cron command translates to the following (in Human-Readable format):
“Every hour between 8:00 pm and 10:00 pm.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at specific intervals. This can be anything from running a script every hour to backing up a database every day. Cron jobs are typically used for maintenance or automation purposes.
A crontab is a file containing commands and instructions for the cron daemon to execute.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every hour between 8:00 pm and 10:00 pm“:
FUN FACT: If you need to temporarily disable a cron job, you can simply comment out the line in the crontab file that corresponds to that particular task..
You might want to set up a crontab or cron job to run every hour between 8:00 pm and 10:00 pm for several reasons, including:
- Automatically send out a report to all employees every evening at 8:00 pm
- Sync data between two servers every hour
- Refresh statistics that are used to generate graphs and charts on a website
Similar Cron Jobs
You might also want to run a crontab:
- every 10 hours
- every 5 hours
- every 4 hours
- every 8 hours
- every 11 hours
- every 3 hours
- every hour between 5:00 am and 7:00 pm
- every hour between 2:00 am and 3:00 pm
FUN FACT: Each user on a system can have their own crontab, and commands in them will be executed as that user..
In this article, you learned how to set up a cron job that runs every hour between 8:00 pm and 10:00 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.