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1. sudo yum install yum-utils

2. 新建 /etc/yum.repos.d/nginx.repo 文件。并复制下面内容进去
   [nginx-stable]
   name=nginx stable repo
   baseurl=http://nginx.org/packages/centos/basearch/
   gpgcheck=1
   enabled=1
   gpgkey=https://nginx.org/keys/nginx_signing.key
   
   [nginx-mainline]
   name=nginx mainline repo
   baseurl=http://nginx.org/packages/mainline/centos/basearch/
   gpgcheck=1
   enabled=0
   gpgkey=https://nginx.org/keys/nginx_signing.key

3. sudo yum-config-manager --enable nginx-mainline

4. sudo yum install nginx

5. nginx -v 校验是否安装成功

6. nginx 启动

nginx 的默认html页面放在以下位置

/usr/share/nginx/html