Network manager keeps modifying resolve.conf and there is no stopping it in Ubuntu 18.04. I tried removing write permissions, change resolve.conf symlink to another file and... I also looked at network manager: how to stop nm updating /etc/resolv.conf but none of the solutions seems to be working in this Ubuntu version.
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What don't you want it to do? – George Udosen Dec 09 '18 at 16:33
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There are various ways to configure NM not to touch /etc/resolv.conf:
[main]
dns=none
or (better)
[main]
rc-manager=unmanaged
in NetworkManager.conf. See man NetworkManager.conf.
You can also set rc-manager=symlink, and make /etc/resolv.conf a symlink pointing to a file (like systemd-resolved's stub resolve.conf). Well, you said, you tried this. Unclear, why that wouldn't work for you.
Or, you make the file immutable, with chattr +i /etc/resolv.conf.
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I'd love your help on this related question. Thanks! https://askubuntu.com/questions/1453982/ubuntu-22-04-1-nameservers-keep-getting-overwritten – Ryan Feb 08 '23 at 03:23