vir：胖子折腾完了，可以修改IP了，方法见帖子-七年博客-关注云计算Web开发技术和分享经验教程的个人博客

1. 查看网卡信息，eth0为旧网卡IP地址，eth0:0为新IP地址

[root@VirFFME7N-3C-5:] ~ # ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 149.57.166.xx  netmask 255.255.255.0  broadcast 149.57.166.255
        ether 00:xx:3c:7e:79:23  txqueuelen 1000  (Ethernet)
        RX packets 24522  bytes 1529220 (1.4 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 657  bytes 85448 (83.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth0:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 47.87.230.xx  netmask 255.255.255.0  broadcast 47.87.230.255
        ether 00:xx:3c:7e:79:23  txqueuelen 1000  (Ethernet)

2. 备份文件网卡配置：

cp /etc/network/interfaces{,.back}

3. 将旧IP地址的配置eth0改成eth0:0，将新IP地址的配置改成eth0，如下所示

# Generated by SolusVM

 auto lo
  iface lo inet loopback

 auto eth0
  iface eth0 inet static
   address 47.87.230.xx
   gateway 47.87.230.1
   netmask 255.255.255.0
   dns-nameservers 8.8.8.8 8.8.4.4

 auto eth0:0
  iface eth0:0 inet static
   address 149.57.166.xx
   gateway 149.57.166.1
   netmask 255.255.255.0
   dns-nameservers 8.8.8.8 8.8.4.4

4. 重启服务器reboot，再次登录系统，通过ifconfig验证。

THE END

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