The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 19 */3 * *
This cron command translates to the following (in Human-Readable format):
“Every 3 days at 7:00 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 files are typically stored in the /etc/crontab file, but they can also be stored in individual user’s home directories. To edit your own crontab file, you can use the command “crontab -e”. This will open up the file in your default text editor.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 3 days at 7:00 pm“:
FUN FACT: Cron jobs are automated processes that run on a schedule..
You might want to set up a crontab or cron job to run every 3 days at 7:00 pm for several reasons, including:
- To run a script that deletes old log files every 3 days
- To send out a reminder email to users every 3 days
- To run a backup script every 3 days
Similar Cron Jobs
You might also want to run a crontab:
FUN FACT: When editing your crontab, it is important to use a text editor that supports Unix-style line endings (LF), as opposed to Windows-style line endings (CRLF)..
In this article, you learned how to set up a cron job that runs every 3 days at 7:00 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.