sudo yum install yum-utils
vi  /etc/yum.repos.d/nginx.repo
输入：

[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

[nginx-mainline]
name=nginx mainline repo
baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

yum-config-manager --enable nginx-mainline
yum install nginx
ps -ef | grep nginx
systemctl enable nginx
systemctl start nginx

默认的html根目录在：/usr/share/nginx/html

默认的配置文件在：/etc/nginx/conf.d/default.conf  以及 /etc/nginx/nginx.conf