centos 7 通过yum 安装 nginx

1. 添加nginx存储库

   sudo yum install epel-release

2. 安装nginx

   sudo yum install nginx

3. 启动nginx

   sudo systemctl start nginx

4. 设置防火墙允许http和https通信

   sudo firewall-cmd --permanent --zone=public --add-service=http 
   sudo firewall-cmd --permanent --zone=public --add-service=https
   sudo firewall-cmd --reload

5. 访问http://ip  
6. 设置nginx开机自启动

   sudo systemctl enable nginx