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I've installed ubuntu server 10.04 on a computer in my LAN. From my router control panel I set it up to be Static DHCP.

My resolv.conf file had the output

nameserver 192.168.1.1

I removed that line and saved .conf file, but I am still able to ping websites from my server's terminal. How can domain names be resolved to ip addresses even though this file is blank?

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    Have you cleared the DNS cache since removing resolv.conf or had it resolve anything that wouldn't have been in the cache?
    – Chopper3
    Jan 9, 2012 at 10:31

3 Answers 3

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nscd is most likely caching the results. Another possibility is that you are running a dns server on your machine, since by default with an empty "nameserver" the resolver routines use "localhost" (man resolv.conf for details)

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  • It's like you have a 6th sense. I now remember including bind9 when I installed ubuntu 10.04
    – user784637
    Jan 9, 2012 at 22:07
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It must have cached those IP addresses.

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nscd is most likely the service caching your names, stopping or restarting it should clear up the cache for you.

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