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After I install libvirt-bin and ubuntu-virt-server, etc., my resolv.conf gets overwritten by dnsmasq about every hour.

I haven't installed network-manager and resolvconf. When I search for dnsmasq I see that only dnsmasq-base has been installed.

When I try to remove dnsmasq-base, libvirt-bin will be removed automatically.

How to keep dns config not be changed?

I use ubuntu 11.10

thanks for every reply.

edit:

$ dpkg --list | grep dnsmasq
$ ii  dnsmasq-base    2.57-1ubuntu1    A small caching DNS proxy and DHCP/TFTP server

$ pgrep dnsmasq
1088

in my syslog file: 

dnsmasq[1088]: reading /etc/resolv.conf
dnsmasq[1088]: using nameserver 192.168.1.1#53
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can you check if dnsmasq is running? pgrep dnsmasq – skyronic Mar 2 '12 at 18:48
1  
AFAIK, dnsmasq doesn't modify resolv.conf. Perhaps you've also got resolvconf installed? The resolvconf package definitely will modify resolv.conf. You can check by running "dpkg --list | grep resolv" – cqcallaw Mar 2 '12 at 18:52
I found these in my syslog file: dnsmasq[1088]: reading /etc/resolv.conf, dnsmasq[1088]: using nameserver 192.168.1.1#53 – Tony Lee Mar 2 '12 at 19:12
and I'm sure I haven't install resolvconf – Tony Lee Mar 2 '12 at 19:13
and I searched for dnsmasq and dnsmasq-util,they are not instelled too, only dnsmasq-base is installed – Tony Lee Mar 2 '12 at 19:15
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1 Answer

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Not dnsmasq but some other package was overwriting /etc/resolv.conf. See /usr/share/doc/resolvconf/README.gz in the resolvconf package for an incomplete list of packages that overwrites /etc/resolv.conf.

As of Ubuntu 12.04 the resolvconf package is part of the base system and resolvconf mediates access to /etc/resolv.conf. See resolvconf(8).

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