ubuntu怎么都无法正常上网

[mai1015]

我连接网络使用一段时间就突然会提示，服务器找不到。无法解析域名

ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 10.0.1.12 icmp_seq=1 Destination Host Unreachable
From 10.0.1.12 icmp_seq=2 Destination Host Unreachable
From 10.0.1.12 icmp_seq=3 Destination Host Unreachable
From 10.0.1.12 icmp_seq=4 Destination Host Unreachable
From 10.0.1.12 icmp_seq=5 Destination Host Unreachable

cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1

sudo /etc/init.d/networking restart
* Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces
* Reconfiguring network interfaces... [ OK ]

ifconfig -a
eth0 Link encap:Ethernet HWaddr e8:9a:8f:f9:e8:18
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

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:10959 errors:0 dropped:0 overruns:0 frame:0
TX packets:10959 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:904802 (904.8 KB) TX bytes:904802 (904.8 KB)

wlan0 Link encap:Ethernet HWaddr 38:59:f9:e4:c7:7b
inet addr:10.0.1.12 Bcast:10.0.1.255 Mask:255.255.255.0
inet6 addr: fe80::3a59:f9ff:fee4:c77b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:71432 errors:0 dropped:0 overruns:0 frame:0
TX packets:47994 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:95051031 (95.0 MB) TX bytes:4818160 (4.8 MB)

netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 10.0.1.1 0.0.0.0 UG 0 0 0 wlan0
10.0.1.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 wlan0

cat /etc/network/interfaces
auto lo
iface lo inet loopback

断线网络，然后重新连接就正常.
可是一会儿又不行了.