1. yum源中默认没有nginx需要自己配置

yum install yum-utils

#通过vim在没有该文件的情况下，直接创建新文件
vim /etc/yum.repos.d/nginx.repo

2.编辑文件内容

[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

3. yum 安装

yum install nginx
 systemctl enable yum
 systemctl daemon-reload 
 systemctl start yum
 systemctl stop yum