1、先安装 yum-utils

[root@izgu3e8gvhx2vgz ~]# yum install yum-utils

2、添加nginx源。创建文件/etc/yum.repos.d/nginx.repo，文件内容如下：

[root@izgu3e8gvhx2vgz ~]# vim /etc/yum.repos.d/nginx.repo
[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，查看nginx源

[root@iZ2ze5oztlicgchxp8yrrtZ ]# yum info nginx
Repository AppStream is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository PowerTools is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Last metadata expiration check: 0:15:39 ago on Tue 11 Aug 2020 03:30:35 PM CST.
Installed Packages
Name : nginx
Epoch : 1
Version : 1.18.0
Release : 1.el8.ngx
Architecture : x86_64
Size : 3.6 M
Source : nginx-1.18.0-1.el8.ngx.src.rpm
Repository : @System
From repo : nginx-stable
Summary : High performance web server
URL : http://nginx.org/
License : 2-clause BSD-like license
Description : nginx [engine x] is an HTTP and reverse proxy server, as well as
: a mail proxy server.

4、安装nginx

[root@izgu3e8gvhx2vgz ~]# yum install nginx

5、验证nginx是否安装成功

[root@iZ2ze5oztlicgchxp8yrrtZ]# nginx -v
nginx version: nginx/1.18.0