（一）环境
OS:CentOS Linux release 7.5.1804 (Core)
Nginx：1.14.0

（二）安装步骤
1、安装epel-release 源
[root@FreeRadius4 ~]# yum -y install epel-release

2、设置nginx安装源

[root@FreeRadius4 ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
enabled=1

###具体可以参考nginx官网文档（http://nginx.org/en/linux_packages.html#stable）

3、安装nginx

[root@FreeRadius4 ~]# yum install nginx -y
Loaded plugins: fastestmirror
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Loading mirror speeds from cached hostfile
 * base: mirrors.163.com
 * epel: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * nux-dextop: mirror.li.nux.ro
 * updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package nginx.x86_64 1:1.14.0-1.el7_4.ngx will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================
 Package                     Arch                         Version                                     Repository                   Size
========================================================================================================================================
Installing:
 nginx                       x86_64                       1:1.14.0-1.el7_4.ngx                        nginx                       750 k

Transaction Summary
========================================================================================================================================
Install  1 Package

Total download size: 750 k
Installed size: 2.6 M
Downloading packages:
nginx-1.14.0-1.el7_4.ngx.x86_64.rpm                                                                              | 750 kB  00:00:01     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : 1:nginx-1.14.0-1.el7_4.ngx.x86_64                                                                                    1/1 
----------------------------------------------------------------------

Thanks for using nginx!

Please find the official documentation for nginx here:
* http://nginx.org/en/docs/

Please subscribe to nginx-announce mailing list to get
the most important news about nginx:
* http://nginx.org/en/support.html

Commercial subscriptions for nginx are available on:
* http://nginx.com/products/

----------------------------------------------------------------------
  Verifying  : 1:nginx-1.14.0-1.el7_4.ngx.x86_64                                                                                    1/1 

Installed:
  nginx.x86_64 1:1.14.0-1.el7_4.ngx                                                                                                     

Complete!

4、创建nginx服务的相关操作

[root@FreeRadius4 ~]# systemctl enable nginx
Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service to /usr/lib/systemd/system/nginx.service.
[root@FreeRadius4 ~]# systemctl start  nginx
[root@FreeRadius4 ~]# systemctl status  nginx
● nginx.service - nginx - high performance web server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2018-09-26 15:59:41 CST; 3s ago
     Docs: http://nginx.org/en/docs/
  Process: 6621 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=0/SUCCESS)
 Main PID: 6622 (nginx)
    Tasks: 2
   Memory: 1.5M
   CGroup: /system.slice/nginx.service
           ├─6622 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
           └─6623 nginx: worker process

Sep 26 15:59:41 FreeRadius4 systemd[1]: Starting nginx - high performance web server...
Sep 26 15:59:41 FreeRadius4 systemd[1]: Started nginx - high performance web server.
[root@FreeRadius4 ~]# nginx -V
nginx version: nginx/1.14.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC) 
built with OpenSSL 1.0.2k-fips  26 Jan 2017
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-compat --with-file-aio --with-threads --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -pie'
[root@FreeRadius4 ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

5、nginx相关配置文件/etc/nginx/nginx.conf下
[root@FreeRadius4 ~]# vim /etc/nginx/conf.d/default.conf

（三）编译安装
请参考 （https://blog.51cto.com/liqingbiao/1692187 ）