懒得装linux，把别的电脑上的虚拟机做的linux硬盘文件拷到自己电脑上使用，却发现无法联网。
debian:~# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:66 errors:0 dropped:0 overruns:0 frame:0
TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5104 (4.9 KiB) TX bytes:5104 (4.9 KiB)
没有了eth0接口，查看/etc/network/interfaces
debian:~# vim /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
iface eth0 inet static
address 192.168.0.190
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 61.128.114.133 61.128.114.166
有eth0的配置，再次ifconfig -a 加-a可以查看所有的接口，不加参数只能查看活动接口。
发现有eth1，eth0没了，这应该是我的虚拟机把网卡认成了eth1，而原来的虚拟机把网卡作为eth0的，导致没有eth1的配置，无法联网，
于是修改/etc/network/interfaces把eth1换成eth1，ifup eth1，还是不行，/etc/init.d/networking restart也不行，reboot，呵呵好了。
