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[ubuntu] DNS lookup fails after 12.10 upgrade

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http://ubuntuforums.org – I upgraded to 12.10 yesterday and now I can't seem to resolve domain names. Connection Information seems to provide proper DNS server addresses from DHCP, but "ping" and "nslookup" both immediately fail with "unknown host" errors. I have tried external servers (google.com, ubuntu.com) as well as internal network host names, and none work. I can successfully ping IP addresses (internal and external). This occurs for both ethernet and wireless connections. Booting into Windows 7 on the same system does not have this problem. ()

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Submitted by colm on 10/19/2012

Stories similar to [ubuntu] DNS lookup fails after 12.10 upgrade

After my upgrade to 12.10, DNS resolution seems to fail for both local and external addresses. I can successfully ping local and external IP addresses (google.com, at least), but pinging DNS names immediately returns ping: unknown host <hostname>.

I have two computers running Ubuntu on the local network connected to a router. The router (at 192.168.2.1) sees both systems (as well as my TV set, isn't technology wonderful!) and recognizes them by name "jcobban-laptop" and "linux-server". However if I try to use those names, for example in a ping, I get "unknown host".

Hi,

I am using Ubuntu 9.04 (x86-64).

My internet connection is not working, i've tried to fix it and the issue seems to be with DNS. I can ping google's IP, but i can ping it URL.

I have used the GUI network manager(from Gnome's equivalent of the Windows system tray), to add the DNS IP addresses to the IPv4 wired connection - that hasn't helped.

I am running Ubuntu 12.04 in a VM, NIC is bridged. This machine is a DHCP/DNS server using DNSMASQ.

Hi,

I'm having a hard time being able to ping or communicate between my Linux devices. For instance; I have Fedora on my desktop and Ubuntu on a laptop. Both are getting IP addresses from the wireless router (10.0.0.x).

Hi I am trying to write a script which runs until the host is up. i got it figured out that it needs to be in loop till it return $? = 0.

Not getting it through though. I am not sure about the 6th line !!!

Code: #!/bin/sh HOSTS="host.txt" ping(){ for myhost in "$HOSTS" do ping -c -1 "$myhost" && $?

Hi Folks,

Could anyone please point me to the right direction as I have spent so much time on this without luck. :wall:

I have installed Bind on my CentOS 5 server for internal network.

I'd like to get my Ubuntu 11.04 server to route packet between its two network interfaces.

The two ethernet interfaces (eth0, eth1) work apparently well as such.

[ubuntu] Lan dns 3 years 13 weeks ago

Hi,

Having just scanned loads of other posts, I can't find one that addresses this name resolution issue of mine.

I have a NAS server running Debian with Dnsmasq (local DNS and DHCP service). This is working well, including fetching upstream requests from my ISP's DNS service and caching them locally.