The Cron Job/Crontab
To have your task run at this frequency, use the following cron:
0 3-4 * * *
This cron command translates to the following (in Human-Readable format):
“Every hour between 3:00 am and 4:00 am.”
What is a Cron Job & Crontab?
A cron job is a scheduled task that is typically executed by the server in order to automate certain processes or tasks. For example, a cron job could be set up to automatically backup a database every night at 2am.
A crontab is a file containing commands and instructions for the cron daemon to execute.
Every cron job uses five fields. Here is an explanation of what each field does in this cron, which runs “every hour between 3:00 am and 4:00 am“:
FUN FACT: Cron jobs are stored in a file called “crontab”, which is short for “cron table”..
You might want to set up a crontab or cron job to run every hour between 3:00 am and 4:00 am for several reasons, including:
- Back up a database between 3:00 and 4:00 am
- Run a system maintenance script between 3:00 and 4:00 am
- Generate reports between 3:00 and 4:00 am
Similar Cron Jobs
You might also want to run a crontab:
- every 11 hours
- every 10 hours
- every 4 hours
- every 2 hours
- every 12 hours
- every hour between 3:00 am and 4:00 am
- every hour between 12:00 pm and 4:00 pm
- every hour between 12:00 am and 2:00 pm
FUN FACT: Each user on a system can have their own crontab, and commands in them will be executed as that user..
In this article, you learned how to set up a cron job that runs every hour between 3:00 am and 4:00 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 crontab cheat sheet for a list of hundreds of popular cron jobs.