The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
30 3 */2 * *
This cron command translates to the following (in Human-Readable format):
“Every 2 days at 3:30 am.”
What is a Cron Job & Crontab?
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 2 days at 3:30 am“:
FUN FACT: When configuring a cron job, you can specify the minute, hour, day of the month, month and day of the week when it should run – this gives you a lot of flexibility in terms of when your task will be performed automatically!.
You might want to set up a crontab or cron job to run every 2 days at 3:30 am for several reasons, including:
- Run a backup every 2 days at 3:30 am
- Generate a report every 2 days at 3:30 am
- Check for updates every 2 days at 3:30 am
- Send an email reminder every 2 days at 3:30 am
Similar Cron Jobs
You might also want to run a crontab:
- every 8 days
- every 10 days
- every 2 days
- every 3 days
- every 6 days
- every 9 days at 3:00 pm
- every 6 days at 5:30 pm
- every 3 days at 10:00 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 2 days at 3:30 am. 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.