删除用户默认配置文件
由于在默认清空下，配置文件是系统自动生成的用户设备配置文件保存在/etc/udev/rule.d/下面：
# cp /etc/udev/rule.d /etc/udev/rule.d.bak.0 -R
# rm /etc/udev/rule.d/*
修改网卡配置文件，添加多IP配置
#vim /etc/network/interfaces
修改或添加如下内容：
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.76.192 netmask 255.255.255.0 gateway 192.168.76.254 auto eth0:0 iface eth0:0 inet static address 192.168.76.193 netmask 255.255.255.0 gateway 192.168.76.254 auto eth0:1 iface eth0:1 inet static address 192.168.76.194 netmask 255.255.255.0 gateway 192.168.76.254
实验环境，我添加了三个IP地址
让配置生效
#/etc/init.d/networking restart
检查效果
#ifconfig
eth0 Link encap:Ethernet HWaddr -------------------------------
inet addr:192.168.76.192 Bcast:192.168.76.255 Mask:255.255.255.0
inet6 addr: fe80::92e6:baff:fea0:b517/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17278 errors:0 dropped:0 overruns:0 frame:0
TX packets:7044 errors:0 dropped:0 overruns:0 carrier:1
collisions:0 txqueuelen:1000
RX bytes:8162087 (8.1 MB) TX bytes:1085377 (1.0 MB)
Interrupt:30
eth0:0 Link encap:Ethernet HWaddr -------------------------------
inet addr:192.168.76.193 Bcast:192.168.76.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:30
eth0:1 Link encap:Ethernet HWaddr -------------------------------
inet addr:192.168.76.194 Bcast:192.168.76.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:30
可以看到三个IP地址，就说明配置成功了。