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06-15-2015, 01:05 PM
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#1
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LQ Newbie
Registered: Jul 2012
Posts: 21
Rep: 
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Ho to disable 'other' interfaces from updating resolv.conf
Hi All;
I am using Ubuntu 13.10, and on my PC there are two network interfaces "eth0" and "eth1". (DHCP is running on both the interfaces)
For some reason, eth1 keeps updating the resolv.conf and I am finding a way to disable eth1 from updating the resol.conf. I want only eth0 to update the resolv.conf. ( I do not want to debug why eth1 keeps updating the resolv.con)
I googled and the solutions which I found in the net was more on providing static dns server, which I dont prefer or by making resolv.conf read only which will disable eth0 from updating the resolv.conf which I dont want,
Other solution which I thought was deleting domain-name, domain-name-servers, domain-search, ntp-servers, etc from /var/lib/NetworkManager/dhclient-eth6.conf but then I guess I have to do that everytime the system reboots.
Anyone has an elegant suggestions on how to overcome this issue?
Thanking in advance.
~vrs.
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06-16-2015, 05:54 AM
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#2
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LQ Guru
Registered: Apr 2010
Location: Continental USA
Distribution: Debian, Ubuntu, RedHat, DSL, Puppy, CentOS, Knoppix, Mint-DE, Sparky, VSIDO, tinycore, Q4OS, Manjaro
Posts: 6,174
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resolv.conf updates
First, no interface has ever updated a file. Your problem is with the software, most likley NetworkManager. I routinely disable and remove NM on any machine I use as a server, and depend upon the older NEtwork software. (NM works great on laptops, but has ALWAYS caused problems on servers for me. YMMV)
I have no doubt that there is some tuning you can do on NM to correct this behavior. If you do not need NM, I would consider eliminating it. This does require managing the settings yourself, but for most environments that is MUCH less work than constantly correcting NM mistakes.
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06-17-2015, 06:03 AM
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#3
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LQ Guru
Registered: Aug 2004
Location: Sydney
Distribution: Rocky 9.x
Posts: 18,434
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Agree with wpeckham re NM: its a PITA. I always disable/remove it as well.
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