The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 7 */4 * *
This cron command translates to the following (in Human-Readable format):
“Every 4 days at 7:00 am.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at a specific time or interval. These jobs are usually used for automating tasks, such as running backups or sending emails. Cron is the name of the program that enables users to schedule these jobs.
A crontab is a file that contains instructions for the cron daemon. The cron daemon is a program that runs in the background and executes tasks at specified times. A crontab file consists of a series of lines, each of which represents a task to be executed. Each line has five fields, separated by spaces or tabs.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 days at 7:00 am“:
FUN FACT: If you need to temporarily disable a cron job, you can simply comment out the line in the crontab file that corresponds to that particular task..
You might want to set up a crontab or cron job to run every 4 days at 7:00 am for several reasons, including:
- Scheduling a job to run every 4 days at 7:00 am
- Running a backup script every 4 days at 7:00 am
- Checking for updates to a software package every 4 days at 7:00 am
Similar Cron Jobs
You might also want to run a crontab:
- every 4 days
- every 9 days
- every 3 days
- every 8 days
- every 10 days
- every 10 days at 11:00 am
- every 8 days at 4:00 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!.
In this article, you learned how to set up a cron job that runs every 4 days at 7:00 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 cron job cheat sheet for a list of hundreds of popular cron jobs.