[mcj]ubuntu16.04无法访问网页：ping: unknown host www.baidu.com-马春杰杰

这个问题真是来得莫名其妙，突然就不能上网了。打不开任何网页，尝试着ping了一下百度，提示

ubuntu@mcj:/root$ ping www.baidu.com
ping: unknown host www.baidu.com

1 2	ubuntu@mcj:/root$ ping www.baidu.com ping: unknown host www.baidu.com

找了很多答案，都不适用于我这个，我这里有两个虚拟网卡eth0和eth1，平时都是用eth1连接，会不会跟这个有关系？

还有一个可能性，那就是mac地址，是不是现在的mac地址冲突？于是着手修改这两个地方，首先禁用eth0，然后修改mac地址

sudo vi /etc/network/interfaces

1	sudo vi /etc/network/interfaces

先把eth0注释掉，然后加入网卡

# 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

auto eth1
iface eth1 inet dhcp
hwaddress ether 00:01:04:1b:2C:1F
#auto eth0
#iface eth0 inet dhcp

# 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

auto eth1

iface eth1 inet dhcp

hwaddress ether 00:01:04:1b:2C:1F

#auto eth0

#iface eth0 inet dhcp

重启一下容器，再次ping百度试试~~

ubuntu@mcj:/root$ ping www.baidu.com
PING www.a.shifen.com (119.75.217.26) 56(84) bytes of data.
^C
--- www.a.shifen.com ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2035ms