Cron tabs, also called crontables or crontab entries, are configuration files used in Unix-based operating systems, such as Linux (an open-source OS) and macOS, to schedule repetitive tasks or commands to run automatically at specified intervals. They are used with the cron daemon, which runs scheduled tasks at scheduled times. Cron tabs allow users to specify the exact time and frequency of a command or script to run, and they are often used for tasks such as backing up files, updating system software, and sending email notifications.  A user crontab is a specific crontab type associated with a particular user and can only be accessed and modified by that user. It allows users to schedule and manage their jobs without interfering with other users' tasks. Learn more about ActiveBatch’s cron software here.