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The configuration file that defines the settings for system jobs that are scheduled to run on a daily, weekly, and monthly basis is /etc/anacrontab. Anacron is designed for systems that are not running continuously, such as laptops or desktops that may be powered off or in sleep mode for extended periods.
Unlike cron, which runs jobs at specific times regardless of whether the system is on or off, anacron ensures that jobs are executed at their designated frequencies (daily, weekly, monthly) if the system has been inactive during their scheduled run times. The anacrontab file outlines which scripts or commands should be run and their frequency, making it an essential tool for maintaining periodic tasks on non-continuously running systems.
The other options do not serve this specific purpose as they are either used for different scheduling mechanisms or do not define system-wide job settings in the same way as anacron does.