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Ubuntu 14.04 中无法通过 WiFi 浏览互联网

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Ubuntu 14.04 中无法通过 WiFi 浏览互联网

我可以连接到 WiFi，但无法在 Ubuntu 14.04 上浏览互联网。之前它运行正常。

ifconfig 如下所示：

eth0      Link encap:Ethernet  HWaddr 3c:97:0e:55:74:a7  
          inet6 addr: fe80::3e97:eff:fe55:74a7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:9000  Metric:1
          RX packets:15017 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6709 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:5679208 (5.6 MB)  TX bytes:1147562 (1.1 MB)

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:65536  Metric:1
          RX packets:137 errors:0 dropped:0 overruns:0 frame:0
          TX packets:137 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:9745 (9.7 KB)  TX bytes:9745 (9.7 KB)

wlan0     Link encap:Ethernet  HWaddr 20:16:d8:1f:e5:5f  
          inet addr:192.168.137.51  Bcast:192.168.137.255  Mask:255.255.255.0
          inet6 addr: fe80::2216:d8ff:fe1f:e55f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:60 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1761 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6977 (6.9 KB)  TX bytes:197694 (197.6 KB)

路线输出 -n

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.137.1   0.0.0.0         UG    0      0        0 wlan0
192.168.137.0   0.0.0.0         255.255.255.0   U     9      0        0 wlan0

ping -c 4 google.com 的输出没有任何结果

ping -c 4 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.137.43 icmp_seq=1 Destination Host Unreachable
From 192.168.137.43 icmp_seq=2 Destination Host Unreachable
From 192.168.137.43 icmp_seq=3 Destination Host Unreachable
From 192.168.137.43 icmp_seq=4 Destination Host Unreachable




06:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8195]
Kernel driver in use: rtl8192ce

答案1

我认为您遇到了网关问题，请运行命令以确保traceroute 8.8.8.8第一跳应该是网关。sudo apt-get install traceroute安装跟踪路由。请发布结果。

您写道“之前运行良好”，因此您要么更改了网关，要么调整了设置/etc/networking/interface。请发布您的界面设置。（请参阅帖子下方的示例）

如果你能 ping 8.8.8.8 但不能 ping google.com，那么你可能也遇到了 DNS 问题，

resolvconf 生成/etc/resolv.conf，

# Generated by resolvconf
nameserver 8.8.8.8
nameserver 8.8.4.4

如果您已更新，/etc/resolv.conf请通过systemctl restart networking 或重新启动sudo service networking restart

检查您是否有正确的名称服务器，您也可以重新安装 resolvconf 并查看是否可以解决问题。
sudo apt-get remove --purge resolvconf && sudo apt-get install --reinstall resolvconf

如果您将DNS 配置为静态，则配置 DNS 的另一个地方是/etc/network/interfaces。

例子/etc/network/interface：

auto eth0
iface eth0 inet static
    address 192.168.1.2
    netmask 255.255.255.0
    gateway 192.168.1.1
    dns-nameservers 8.8.8.8 8.8.4.4

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