Comments on: Fixing NetworkManager DNS issue in Ubuntu (Hardy Heron/Gutsy)

By: Gus

Gus — Sat, 14 Jan 2012 14:55:46 +0000

This works perfectly !!!!! thanks

By: juan

juan — Sat, 22 Oct 2011 08:36:13 +0000

thanks man, helped

By: Eric Rider

Eric Rider — Tue, 08 Feb 2011 11:30:02 +0000

i got an old laptop which runs version 8.04 (can’t install version 10 on it, yes, it’s that old :) )
changing /etc/resolv.conf messes up NetworkManager (results in a no working connection) but your first solution worked like a charm for me.

thanks a lot.

By: cejota

cejota — Mon, 31 Jan 2011 14:14:18 +0000

My god!

this work VERY fine for me!

Thank you a lot.

By: arky

arky — Sun, 22 Aug 2010 03:57:23 +0000

Tried this on Ubuntu 10.04, it works well! Thank you

By: Ezekiel

Ezekiel — Wed, 14 Oct 2009 09:36:43 +0000

Overiding /etc/resolver.conf access rights really did it for me.

chmod -w /etc/resolver.conf

By: Carl

Carl — Tue, 09 Dec 2008 20:12:20 +0000

I tried both of these. Neither worked. I have used dhclient.conf to maintain my caching nameserver as the first entry in my resolv.conf file for years. Now, it really seems that NetworkManager has taken over stewardship of this file and does not provide a mechanism that replaces the old dhclient.conf prepend directive. This is a shame. They’ve missed the mark. Instead of making networking painless for me they’ve made it more painful.

Anyway, I decided that the easiest way out of this situation for me was to write this script which inserts localhost as the first name server regardless of who wants to own /etc/resolv.conf. (BTW, I used dnsmasq for DNS caching on my laptop)

% cat /etc/resolv.conf.fix
if [ ! -t 0 ]; then
exec > /dev/null 2>&1
fi

if ! grep -q 0.0.0.0 /etc/resolv.conf; then
ed /etc/resolv.conf << EOF
/^nameserver
i
nameserver 0.0.0.0
.
w
q
EOF
fi

Then, I added a cron entry in to root’s cron table to run this every minute.

I really didn’t like this solution but it was quick and dirty. It is not a good long-term solution. The best solution will be to fix NetworkManager to leave it alone or to allow prepending of nameservers into this file.

By: shinzies

shinzies — Mon, 01 Dec 2008 21:20:11 +0000

Thanks Mikhail
Your solution seems to be working fine for me as well.
Very Good Tip!!!