Ubuntu 连接无线但是不工作!

Ubuntu 连接无线但是不工作!

我刚刚安装Ubuntu 14.04 LTS在我的笔记本电脑上,它连接到我的无线网络并显示已连接,但当我尝试加载网页或执行任何操作(例如下载 Steam for Dota 2)时,它不起作用。当我尝试将我的 Facebook 帐户连接到 Ubuntu 时,它不起作用。我希望能够在可以访问 Internet 的情况下使用 Ubuntu。我该怎么办?

ifconfig 

this shows up

eth0      Link encap:Ethernet  HWaddr 88:ae:1d:60:56:eb  
          inet addr:192.168.1.13  Bcast:192.168.1.255  Mask:255.255.255.0
          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)
          Interrupt:16 

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:24 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1856 (1.8 KB)  TX bytes:1856 (1.8 KB)

When I type
ping askubuntu.com

this shows up
ping: unknown host askubuntu.com

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