why does resolv.conf change?
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From: Clive McBarton on 18 Mar 2010 12:00 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 My /etc/resolv.conf gets overwritten periodically. Any ideas why? I thought network-manager was the culprit and deinstaled it, but the problem persists. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkuiTHAACgkQ+VSRxYk440/stQCg5m+4SQMeIWd/Z3DulcUCkeO1 qTsAoJ1noERVXo+49K5jCE9qXObT7NdB =w/w4 -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BA24C70.8030607(a)web.de
From: Stephen Powell on 18 Mar 2010 12:10 On Thu, 18 Mar 2010 11:53:20 -0400 (EDT), Clive McBarton wrote: > > My /etc/resolv.conf gets overwritten periodically. Any ideas why? > > I thought network-manager was the culprit and deinstaled it, but the > problem persists. I've had this happen to me when I switch between a hard-wired ethernet connection and a dial-up PPP connection. When on the road and using a dial-up connection, I enter ifdown eth0 pon Once the ppp connection comes up, /etc/resolv.conf has changed to identify the DNS servers supplied by the dial-up ISP, which are different than the DNS servers supplied via DHCP over my ethernet cable modem connection at home. This may not be your exact situation, but maybe it will give you some ideas. Perhaps switching between hard-wired ethernet and wireless could do something similar? I don't know. -- .''`. Stephen Powell <zlinuxman(a)wowway.com> : :' : `. `'` `- -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/99365066.20059811268928252326.JavaMail.root(a)md01.wow.synacor.com
From: Camaleón on 18 Mar 2010 12:10 On Thu, 18 Mar 2010 16:53:20 +0100, Clive McBarton wrote: > My /etc/resolv.conf gets overwritten periodically. Any ideas why? Maybe because you are using a DHCP setup? *** http://wiki.debian.org/NetworkConfiguration#Definingthe.28DNS.29Nameservers The C library and other resolver libraries look to /etc/resolv.conf for a list of nameservers. In the simplest case, that is the file to edit to set the list of name servers. *But note that various other programs for dynamic configuration will be happy to overwrite your settings:* 1. The resolvconf program 2. The network-manager daemon 3. DHCP clients *** Greetings, -- Camaleón -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/pan.2010.03.18.16.03.53(a)gmail.com
From: Chris Jackson on 18 Mar 2010 12:20 Clive McBarton wrote: > My /etc/resolv.conf gets overwritten periodically. Any ideas why? > > I thought network-manager was the culprit and deinstaled it, but the > problem persists. dhcpd can do it. -- Chris Jackson Shadowcat Systems Ltd. -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4BA24D06.7030803(a)shadowcat.co.uk
From: Sjoerd Hardeman on 18 Mar 2010 12:30 Clive McBarton schreef: > My /etc/resolv.conf gets overwritten periodically. Any ideas why? > > I thought network-manager was the culprit and deinstaled it, but the > problem persists. As mentioned by others, /etc/resolv.conf is polled by the system when it needs info on how to do a dns lookup. Therefore, dhcp, ifconfig (ifup), wicd, network-mananger etc all can write to that file when they set up some interface. Therefore, dns settings should be set either via dhcp, in /etc/networks/interfaces or via some user-leven config framework like wicd or network-manager. Sjoerd
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