https://blog.wongcw.com/2019/04/18/%e5%85%8d%e8%b2%bb%e7%9a%84%e5%9f%ba%e6%96%bccentos%e9%96%8b%e9%80%9akvm%e9%9b%b2%e4%b8%bb%e6%a9%9f%e7%9a%84iaas%e7%a7%81%e6%9c%89%e4%ba%91%e5%b9%b3%e5%8f%b0%e8%bb%9f%e4%bb%b6-nano/
免費的基於CentOS開通KVM雲主機的IaaS私有云平台軟件–Nano