With the introduction of systemd timer units in RHEL 7, which software package is needed to utilize this feature?

To utilize systemd timer units in RHEL 7, the correct choice is the software package associated with systemd itself. systemd is the init system that manages system processes and services in RHEL 7, including the scheduling of tasks through timer units.

Unlike traditional cron and anacron, which are used for scheduling recurring tasks in a more conventional manner, systemd timers offer more flexibility and control over task scheduling. They can trigger jobs based on a variety of conditions, such as time, system events, or specific service statuses, making them a more powerful tool in the modern Linux ecosystem.

The alternative choices do not directly relate to systemd timer units. For instance, the sysstat package is primarily used for collecting and reporting system activity information, while cron and anacron are tools for scheduling jobs in a more straightforward way without the advanced capabilities provided by systemd timers. Thus, selecting an option associated with systemd is essential for leveraging its timer functionalities effectively.