The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
50 */4 * * *
This cron command translates to the following (in Human-Readable format):
“Every 4 hours at 50 minutes past the hour.”
What is a Cron Job & Crontab?
A cron job is a time-based task that is set to run at specific intervals. This can be anything from running a script every hour to backing up a database every day. Cron jobs are typically used for maintenance tasks or tasks that need to be performed regularly, such as checking for updates or sending out reports.
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 hours at 50 minutes past the hour“:
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 4 hours at 50 minutes past the hour for several reasons, including:
- Sending a daily report
- Cleaning up temporary files
- Generating statistics
- Checking for system updates
- Running a backup
Similar Cron Jobs
You might also want to run a crontab:
- every 2 hours
- every 9 hours
- every 5 hours
- every 12 hours
- every 1 hour
- every 10 hours
- every hour between 7:00 am and 11:00 pm
- every hour between 4:00 am and 10:00 am
FUN FACT: You can use cron to schedule just about anything!.
In this article, you learned how to set up a cron job that runs every 4 hours at 50 minutes past the hour. 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.