小白一枚，双系统win7+unbuntu14.04
装完ubuntu后，连接wifi，却上不了网.
oot@huxiaoxiong-X550CC:/tmp# ifconfig -a
eth0 Link encap:以太网 硬件地址 40:16:7e:ec:14:76
inet 地址:172.16.75.20 广播:172.16.75.255 掩码:255.255.255.0
inet6 地址: fe80::4216:7eff:feec:1476/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 跃点数:1
接收数据包:10489 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:300 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:917599 (917.5 KB) 发送字节:20669 (20.6 KB)
lo Link encap:本地环回
inet 地址:127.0.0.1 掩码:255.0.0.0
inet6 地址: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 跃点数:1
接收数据包:707 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:707 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:0
接收字节:62712 (62.7 KB) 发送字节:62712 (62.7 KB)
wlan0 Link encap:以太网 硬件地址 54:35:30:7c:29:b5
inet 地址:192.168.191.4 广播:192.168.191.255 掩码:255.255.255.0
inet6 地址: fe80::5635:30ff:fe7c:29b5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 跃点数:1
接收数据包:175 错误:0 丢弃:0 过载:0 帧数:0
发送数据包:333 错误:0 丢弃:0 过载:0 载波:0
碰撞:0 发送队列长度:1000
接收字节:24514 (24.5 KB) 发送字节:56435 (56.4 KB)
root@huxiaoxiong-X550CC:/tmp# iwconfig
eth0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"CMCC"
Mode:Managed Frequency:2.462 GHz Access Point: 32:3A:64:80:F2:9B
Bit Rate=6 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=57/70 Signal level=-53 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:36 Missed beacon:0
lo no wireless extensions.
root@huxiaoxiong-X550CC:/tmp# uname -r
4.2.0-27-generic
root@huxiaoxiong-X550CC:/tmp# route -nv
内核 IP 路由表
目标 网关 子网掩码 标志 跃点 引用 使用 接口
0.0.0.0 172.16.75.254 0.0.0.0 UG 0 0 0 eth0
172.16.75.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
192.168.191.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0
root@huxiaoxiong-X550CC:/tmp# vi /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 192.168.191.1
nameserver 114.114.114.114
nameserver 127.0.1.1
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