From Proxmox VE
The Linux kernel is a Unix-like operating system kernel. Released under the GNU General Public License version 2 (GPLv2) and developed by contributors worldwide, Linux is one of the most prominent examples of free software.
Proxmox VE currently uses version 2.6.32, which has really good hardware support. Our kernel is based on the latest RHEL6, including OpenVZ kernel patches, and finally a hardware detection system.