1 to download an image file
I was http://mirrors.zju.edu.cn/centos/7.6.1810/isos/x86_64/CentOS-7-x86_64-DVD-1810.iso
2. I encountered three problems when installing
2.1 The first is the version of choice, if matched with their own image
2.2 The memory size distribution must not be small and 1g, otherwise blank screen when the rear mounted easily
2.3 system is installed, when logging in, you will not have any input interface display password, but the system is still not visible to the read (this is very important, do not cause an error)
This is the complete installation Contos complete step https://blog.csdn.net/xzl18779631005/article/details/81198805
Contos more practical command https://www.cnblogs.com/jyxbk/p/6678362.html