我是在centos7虛擬機器上進行實驗的
該實驗基於新增好ip的基礎上，如何給網絡卡新增ip請查閱我的部落格
先來看一下我的ip

[[email protected] nginx]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.128  netmask 255.255.255.0  broadcast 192.168.3.255
        inet6 fe80::6b14:b58e:faa2:525  prefixlen 64  scopeid 0x20<link
 
>
        ether 00:0c:29:5e:7c:27  txqueuelen 1000  (Ethernet)
        RX packets 62179  bytes 43830505 (41.8 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 33693  bytes 4570753 (4.3 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ens33:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST
 
>  mtu 1500
        inet 192.168.3.123  netmask 255.255.255.0  broadcast 192.168.3.255
        ether 00:0c:29:5e:7c:27  txqueuelen 1000  (Ethernet)

ens33:2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.125  netmask 255.255.255.0  broadcast 192.168.3.255
        ether 00:0c:29:5e:7c:27  txqueuelen 1000  (Ethernet)

lo: flags=73<UP,LOOPBACK,RUNNING
 
>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 185219  bytes 29342174 (27.9 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 185219  bytes 29342174 (27.9 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:61:e7:bc  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[[email protected] nginx]# 

安裝好nginx之後（方法有說過了，這裡不重複）
安裝路徑不知道你裝哪裡，直接 find / -name nginx.conf並進行編輯

[root@localhost nginx]# cat nginx.conf|grep -v "#"|grep -v "^$"
worker_processes  1;#這個引數一般可設為cpu核數，例如我的cpu是i3 3110m，那麼這裡我就可以通過修改為4來提高效能，但目前我還沒進行到那步，所以就先在這裡說一下而已
events {
    worker_connections  1024;
}
http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    server {
        listen       80;             #監聽的埠，這裡是預設的ip128
        server_name  localhost;      #伺服器名
        location / {
            root   html;             #網站目錄，是nginx安裝目錄下的html
            index  index.html index.htm index.php;   #預設頁面
        }
        error_page  404              /404.html;      #錯誤頁面
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
        location ~ \.php$ {                           #相當於啟用php吧
            root           html;                      #這裡需要根據網站目錄進行修改
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
    }
    server{
        listen 192.168.3.123:80;
        server_name 192.168.3.123;
        access_log logs/bp2.access.log combined;     #日誌路徑，combined 日誌格式名稱
        location /
        {
            index index.html index.php;
            root html/bp2;
        }
        location ~ \.php$ {
            root           html/bp2;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }

    }
    server{
        listen 192.168.3.125:80;
        server_name 192.168.3.125;
        location /{
            root html/bp3;
            index index.html index.php;
        }
        location ~ \.php$ {
            root           html/bp3;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }
    }
}
[root@localhost nginx]# 

需要重啟nginx而已，重啟命令 nginx -s reload（這個命令需要進入到sbin資料夾下，不是那個地方都可以的）。
以後注意了，凡是修改了伺服器的配置檔案，一般都需要重啟伺服器

[[email protected] nginx]# cat html/bp3/index.php
<?php
echo bp3;
?>
[[email protected] nginx]# 

來看一下效果