1. 首先查看liunx版本
cat /etc/redhat-release
2.下载nginx rpm包
wget http://nginx.org/packages/rhel/8/x86_64/RPMS/nginx-1.20.1-1.el8.ngx.x86_64.rpm
3. 安装
rpm -ivh nginx-1.20.1-1.el8.ngx.x86_64.rpm
4.启动
systemctl start nginx