Which operating system does the vCenter Server run on?

The vCenter Server runs on a Linux-based appliance starting with version 6.7 and later, known as the vCenter Server Appliance (VCSA). This appliance is optimized for running in virtual environments and provides a more efficient and streamlined approach compared to the traditional Windows-based installations. The Linux-based architecture offers several advantages, including improved performance, reduced resource consumption, and simplified management through a web-based interface.

Moreover, the VCSA is packaged with the necessary components for VMware’s management services, allowing for a more integrated experience in virtual environment management. The decision to move to a Linux-based appliance aligns with VMware's strategy to leverage open-source technologies while ensuring robust functionality and support.

Other operating systems listed, such as Windows Server, MacOS, and FreeBSD, do not host the vCenter Server in its more recent iterations, indicating a purposeful shift towards a more standardized and efficient Linux-based solution for virtual infrastructure management.