What is the function of 'crontab' in Linux?

The function of 'crontab' in Linux is to schedule periodic tasks. It allows users to run scripts or commands at specified intervals, which can be defined in a configuration file called a crontab. This file specifies what commands to run and when to execute them based on the defined timing schedule.

Using 'crontab', users can automate various repetitive tasks, such as backups, system maintenance, or running scripts without needing to manually execute them each time. This service is essential for system administrators who require regular updates or maintenance jobs to be performed automatically.

The other functions listed, such as creating backups, monitoring system processes, or managing user permissions, are accomplished through other tools and commands within Linux, but they are not the primary purpose of 'crontab'.