I just performed a fresh install of Ubuntu 12.04.3 64-bit, and I cannot connect to the internet.
Ubuntu is installed on its own partition, with Windows 7 on the other. Yet while I'm able to connect to the internet using Windows 7, I am unable to do so using Ubuntu.
I use a Linksys Wireless-G USB network adapter dongle (WUSB54GC). It shows that I am successfully connecting to my router over wi-fi.
I had successful internet connection when I was using the 32-bit version of Ubuntu 12.04.3.
Can you help?
Thank you.
EDIT 1:
nicholas@Nicholas:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 20:cf:30:3f:fd:93
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:65536 Metric:1
RX packets:60 errors:0 dropped:0 overruns:0 frame:0
TX packets:60 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3808 (3.8 KB) TX bytes:3808 (3.8 KB)
wlan0 Link encap:Ethernet HWaddr 00:22:6b:9e:38:92
inet addr:192.168.1.119 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::222:6bff:fe9e:3892/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:145 errors:0 dropped:0 overruns:0 frame:0
TX packets:127 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23530 (23.5 KB) TX bytes:17789 (17.7 KB)
ifconfig
output under 'EDIT 1'. I will try some of the commands given in the link you provided.