The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 21 * * *
This cron command translates to the following (in Human-Readable format):
“Every 1 day at 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 jobs are typically used for maintenance tasks, such as backing up data or updating software.
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 1 day at 9:00 pm“:
FUN FACT: Cron jobs are used to schedule commands or scripts to run automatically at a specified time and date..
You might want to set up a crontab or cron job to run every 1 day at 9:00 pm for several reasons, including:
- Checking for updates on a website
- Running a daily backup
- Generating reports
- Sending out nightly emails
Similar Cron Jobs
You might also want to run a crontab:
- every 9 days
- every 3 days
- every 2 days
- every 4 days
- every 5 days
- every 6 days
- every 2 days at 9:30 pm
- every 9 days at 1:30 am
- every 2 days at 11:00 pm
FUN FACT: The most common way to edit cron jobs is using the crontab command – this stands for “cron table,” and it contains all the information about when your tasks should be executed..
In this article, you learned how to set up a cron job that runs every 1 day at 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.