nginx官方文档地址：http://nginx.org/en/linux_packages.html#RHEL-CentOS

安装依赖

sudo yum install yum-utils

设置yum库

创建文件 /etc/yum.repos.d/nginx.repo，内容如下：

[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

[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

mainline版本

如果要安装mainline版本，运行需要运行下面的命令：

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

安装

sudo yum install nginx