域名提供商上配置的信息相当在DNS服务器上给我们配置了，这个配置后只能将我们的主机和域名匹配上，我们还需要在服务器上配置来将我们的项目配置到二级域名上，比如说我们服务器上有个博客项目叫blog,我们的域名是qq.com,我想通过blog.qq.com访问到我们的blog项目，那么我们需要把我们这个想法告诉服务器，通过服务器的配置文件

nginx的目录在/etc/nginx   在/etc/nginx目录下nginx.conf是主要配置文件，里面有这样的描述

http{

include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;

}

包含了指定目录下的配置文件，所以我们去看一下这两个文件夹，其中/etc/nginx/conf.d目录里是空的， /etc/nginx/sites-enabled目录里有个叫default的文件

打开这个文件（下面是整个文件的描述，自定义的server配置我会标红，如果不想细看，可以直接往下拉）

# You may add here your
# server {
# ...
# }
# statements for each of your virtual hosts to this file
# '#'在linux中通常表示注释当行，这里面我们发现Google的Nginx还是挺贴心的，给出了解释和参考文档地址，如果我们的服务器有https访问得需求，也可以在这个文件中配置
##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# http://wiki.nginx.org/Pitfalls
# http://wiki.nginx.org/QuickStart
# http://wiki.nginx.org/Configuration
#
# Generally, you will want to move this file somewhere, and start with a clean
# file but keep this around for reference. Or just disable in sites-enabled.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

server {
listen 80 default_server;
listen [::]:80 default_server ipv6only=on;

root /usr/share/nginx/html;
index index.php index.html index.htm;

# Make site accessible from http://localhost/
server_name localhost;

location / {
# First attempt to serve request as file, then
# as directory, then fall back to displaying a 404.
try_files $uri $uri/ =404;
# Uncomment to enable naxsi on this location
# include /etc/nginx/naxsi.rules
}

# Only for nginx-naxsi used with nginx-naxsi-ui : process denied requests
#location /RequestDenied {
# proxy_pass http://127.0.0.1:8080;    
#}

#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 /usr/share/nginx/html;
#}

# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
location ~ \.php$ {
# fastcgi_split_path_info ^(.+\.php)(/.+)$;
# # NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
#
# With php5-cgi alone:
include /etc/nginx/fastcgi_params;
fastcgi_pass 127.0.0.1:9000;
# With php5-fpm:
# fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /usr/share/nginx/html$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;
#}
}

#MY CONFIG START
server
{
listen   80;
server_name  qq.com;
  root   /usr/share/nginx/html;
    index  index.php index.html index.htm;
    location ~ \.php$ {
include /etc/nginx/fastcgi_params;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
}
}

#先配置的是qq.com,相信我有配置这个的必要性，location里面的是为了让我们的Nginx服务器知道.php文件要去找php解释器执行，不配置可能会出现访问即下载文件的现象
#不要问我为什么，我是抄上面那个默认的server的，错不了，手动滑稽
server
{
    listen   80;
    server_name   blog.qq.com;
    root   /usr/share/nginx/html/blog;
    index  index.php index.html index.htm;
    location ~ \.php$ {
include /etc/nginx/fastcgi_params;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
}
}
#MY CONFIG END

# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# root html;
# index index.html index.htm;
#
# location / {
# try_files $uri $uri/ =404;
# }
#}

# HTTPS server
#
#server {
# listen 443;
# server_name localhost;
#
# root html;
# index index.html index.htm;
#
# ssl on;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
#
# ssl_session_timeout 5m;
#
# ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
# ssl_ciphers "HIGH:!aNULL:!MD5 or HIGH:!aNULL:!MD5:!3DES";
# ssl_prefer_server_ciphers on;
#
# location / {
# try_files $uri $uri/ =404;
# }
#}