UltraISO软件刻录到U盘，一定要采用Raw格式。
NUC主机识别U盘系统，需要开机按f2后，在设置中关闭security boot。
PVE安装后，在本地存储中上传CentOS镜像
并创建虚拟机，虚拟机的硬件配置根据实际情况调整，然后启动虚拟机，在弹出的Web控制台进行系统的安装。
Prerequisites
A physical or dedicated server.
64bit CPU.
At least 1GB of RAM (and additional RAM needed for guests).
A USB stick with at least 1GB.
1. Move to the server (machine) where you want to install Proxmox and plug in the USB device.
2. While the server is booting up, access the boot menu by pressing the required keyboard key(s). Most commonly, they are either Esc, F2, F10, F11, or F12.
3. Select the installation medium with the Proxmox ISO image and boot from it.
4. Next, the Proxmox VE menu appears. Select Install Proxmox VE to start the standard installation.
