The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 14-21 * * *
This cron command translates to the following (in Human-Readable format):
“Every hour between 2:00 pm and 9:00 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 backup script every night to sending out an email notification once a week. Cron jobs are typically used for maintenance or repetitive tasks.
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.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every hour between 2:00 pm and 9:00 pm“:
FUN FACT: If you want to see what commands are scheduled in your crontab, type: “crontab -l”.
You might want to set up a crontab or cron job to run every hour between 2:00 pm and 9:00 pm for several reasons, including:
- Perform a daily backup at 2pm
- Update a blog at 3pm
- Send out a newsletter at 4pm
- Run a report at 5pm
- Generate leads at 6pm
- Process orders at 7pm
- Notify users of new content at 8pm
Similar Cron Jobs
You might also want to run a crontab:
- every 12 hours
- every 8 hours
- every 11 hours
- every 4 hours
- every 2 hours
- every hour between 9:00 am and 1:00 pm
- every hour between 3:00 pm and 4:00 pm
FUN FACT: When troubleshooting issues with cron jobs, it can be helpful to run them manually from the command line – this will allow you to see any error messages that might be generated..
In this article, you learned how to set up a cron job that runs every hour between 2:00 pm 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 crontab cheat sheet for a list of hundreds of popular cron jobs.