The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
40 */5 * * *
This cron command translates to the following (in Human-Readable format):
“Every 5 hours at 40 minutes past the hour.”
What is a Cron Job & Crontab?
A cron job is a task that is scheduled to run at a specified time or interval. Cron jobs are commonly used to automate system maintenance or administration tasks, such as running backups or sending emails.
A crontab is a file containing commands and instructions for the cron daemon to execute. The crontab is used to schedule jobs (commands or shell scripts) to run periodically at certain times or dates.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 5 hours at 40 minutes past the hour“:
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 5 hours at 40 minutes past the hour for several reasons, including:
- Automatically checking for updates to software and installing them
- Deleting temporary files that are no longer needed
- Generating reports on system usage
- Sending out reminders for upcoming events
Similar Cron Jobs
You might also want to run a crontab:
- every 12 hours
- every 3 hours
- every 6 hours
- every 4 hours
- every 1 hour
- every hour between 2:00 am and 3:00 pm
- every hour between 2:00 pm and 5:00 pm
- every hour between 12:00 am and 2:00 pm
FUN FACT: Cron jobs are named after the Greek god Chronos, who represents time itself..
In this article, you learned how to set up a cron job that runs every 5 hours at 40 minutes past the hour. 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.