The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 20 */7 * *
This cron command translates to the following (in Human-Readable format):
“Every 7 days at 8:00 pm.”
What is a Cron Job & Crontab?
In computing, a cron job is a time-based task that is set to run at certain predetermined times or intervals. A cron job can be used to schedule anything from basic tasks like running backups to more complex tasks like sending out email alerts or syncing files between servers. Cron jobs are typically used for maintenance or administrative tasks that need to be performed on a regular basis.
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 7 days at 8:00 pm“:
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 7 days at 8:00 pm for several reasons, including:
- Sending a weekly email update to all users
- Archiving data that is more than 7 days old
- Generating reports on system usage for the past week
- Triggered backups of databases
Similar Cron Jobs
You might also want to run a crontab:
- every 7 days
- every 5 days
- every 3 days
- every 10 days
- every 2 days
- every 1 day at 8:00 pm
- every 7 days at 5:30 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 7 days at 8:00 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.