Cron is a Linux/UNIX service that allows users to run scripts or programs automatically at a specified time and is commonly used to automate system maintenance or administration. It starts when the system boots and runs in the background as long as the system is up. The cron daemon is similar to the Task Scheduler application from Windows. It’s often useful to have a script or command executed without any human intervention. For example, you might want to have a script that creates regular backups of your files and folders and stores them in a specified location. For this cron is the perfect tool to do the job.