The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 0 26 */4 *
This cron command translates to the following (in Human-Readable format):
“Every 4 months on day 26 of the month.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at specific intervals. These jobs are usually used for maintenance or automation purposes. For example, a cron job could be set to delete temporary files every week so that they don’t take up space on the server.
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. The crontab file is used to specify which tasks are to be run and when they are to be run.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every 4 months on day 26 of the month“:
FUN FACT: Cron is one of the most versatile tools in a Linux administrator’s toolbox..
You might want to set up a crontab or cron job to run every 4 months on day 26 of the month for several reasons, including:
- Run a script to update software on the 26th day of every 4th month
- Perform system maintenance tasks on the 26th day of every 4th month
- Generate reports on the 26th day of every 4th month
- Backup data on the 26th day of every 4th month
Similar Cron Jobs
You might also want to run a crontab:
- every 3 months
- every 2 months
- every 1 month
- every 4 months
- every 6 months
- every 2 months on day 14 of the month
- every 6 months on day 9 of the month
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 4 months on day 26 of the month. 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.