System maintenance tasks include things like deleting old log files to save storage space or checking for system updates regularly to ensure system software is up to date and compliant. We go into each of these in detail in the following sections. Uses of cron jobsĬron jobs serve a wide range of applications including automation of system maintenance tasks, periodic backups of files and databases, sending email notifications, and other repetitive tasks. We’ll discuss crontab in more detail later on in this post. The lines that start with # represent comments. You can view the content of the crontab file by running the following command:Īfter running the command, you should get an output very similar to this: Crontab is used for setting up cron jobs. Under the hood, the cron daemon checks the crontab file for any active tasks. However, if you're setting up a cron job on a server, you'll need to SSH into the server first. You can set the schedule for a cron job using the terminal on a Linux operating system. What are cron jobs?Ĭron jobs are tasks that run automatically following some predefined schedule. We'll also introduce Airplane schedules as a powerful alternative that you can get started with for free. In this post, we’ll cover what cron is and how to start, stop, and restart cron jobs. Since these jobs are highly customizable, you can do things like set a cron job to run every 60 minutes or only run on Saturdays and Sundays. For example, a cron job might execute a script that sends emails to users on a specific day. One popular solution is using cron.Ī cron job, or simply cron, is a job scheduler that you set up on a machine or server to perform tasks at a specific interval. Fortunately, most servers and operating systems provide some means to conduct repetitive tasks automatically.
We often run into situations that require us to run a piece of code periodically-for example, renewing SSL certificates that may expire every year or two.
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