The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
* 1-20 * * *
This cron command translates to the following (in Human-Readable format):
“Every minute between 1:00 am and 8:00 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 jobs are typically used for automating system maintenance or administration tasks, such as running backups or sending email reports.
Crontab is a file that contains commands and instructions for the cron daemon to execute. The crontab file is usually located in the /etc/cron directory. Each user on a system can have their own crontab file. The commands in the crontab files are executed by the cron daemon at the specified times.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every minute between 1:00 am and 8:00 pm“:
FUN FACT: If you need to delete a cron job, simply remove the corresponding line from the crontab file and save your changes..
You might want to set up a crontab or cron job to run every minute between 1:00 am and 8:00 pm for several reasons, including:
- checking if a server is up and running
- sending out reminders
- backing up data
- generating reports
Similar Cron Jobs
You might also want to run a crontab:
- every 9 minutes
- every 11 minutes
- every 26 minutes
- every 21 minutes
- every minute between 3:00 pm and 7:00 pm
- every minute between 2:00 am and 5:00 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 minute between 1:00 am and 8:00 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.