Ubuntu :: Broken Internet 10.04 With Functioning Networking?

internet access is no longer working on my computer, ie wget, ping, apt-get update all return unkown host (url or whatever).

However the system monitor (Network History) shows that the system is sending and receiving packets. And what I think is network manager applet shows active network signals for both wireless and ethernet.

I know my laptop has not acquired hardware faults. Since I am posting this message and accessing the internet through the same computer with a Ubuntu live USB start up disk.

I searched through the forums for related posts and tried suggestions. Forinstance

the /etc/resolv.conf

file is the same for both live usb system and hard drive system, so it can not be that.

# Generated by NetworkManager
nameserver 79.138.0.180
nameserver 85.8.31.209
the /etc/network
interfaces file looks like:
code....

I tried the system test (System->Administration->System Test), with only Network tests selected). The results of system test were so extensive I searched for the word internet and extracted lines for internet. Interestingly it says both the network_test and the internet_test are _passed_.

But the internet does not work in either in web browsers or with BASH commands.

And also:

erlang-inets Erlang/OTP Internet clients and servers
python-twisted-bin Event-based framework for internet applications
python-twisted-core Event-based framework for internet applications
network_test pass
internet_test pass