前景提要：
因为跨域问题，前期找服务。

1. 进入linux服务器找到配置nginx安装位置

ps aux|grep nginx

root 19556 0.0 0.0 46920 4012 ? S 16:40 0:00 nginx: worker process
root 21100 0.0 0.0 46920 3032 ? Ss 1月09 0:00 nginx: master process ./nginx -c /usr/local/nginx/conf/nginx.conf
root 25898 0.0 0.0 112728 988 pts/3 S+ 18:16 0:00 grep --color=auto nginx

所以我的nignx的地址是 /usr/local/nginx/conf/nginx.conf

cd /usr/local/nginx/conf

2. 查看内部有什么文件

简单的ls就可以看到其中有各种配置文件，还有一些配置文件

vim nginx.conf

可以看到nginx配置文件的全貌（说起来，我之前搭过nginx服务器，但是现在完全忘记了，nginx服务配置是不是完全修改一个配置文件）

3.大致浏览一下默认的nginx.conf有什么内容

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';
    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}
                

来自菜鸟教程（没有广告，只是引用）的文件结构:

...              #全局块

events {         #events块
   ...
}

http      #http块
{
    ...   #http全局块
    server        #server块
    { 
        ...       #server全局块
        location [PATTERN]   #location块
        {
            ...
        }
        location [PATTERN] 
        {
            ...
        }
    }
    server
    {
      ...
    }
    ...     #http全局块
}

小记：暂时这样子吧，稍微能看懂一点，迟点加点注释。初碰就这样子吧；主要是我哥突然跟我说给我介绍对象，我有点接受不了。

引用

Nginx配置详情https://www.runoob.com/w3cnote/nginx-setup-intro.html