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Thread: Have to fix DNS failure after every reboot (22.04)

  1. #1
    Join Date
    May 2023

    Have to fix DNS failure after every reboot (22.04)

    Every time I reboot Ubuntu, my DNS doesn't work. After running the following commands in sudo mode, everything is fine until I restart again.

    rm /etc/resolv.conf
    ln -s /run/resolvconf/resolv.conf /etc/resolv.conf
    resolvconf -u
    What can I do to solve this permanently?

  2. #2
    Join Date
    Mar 2010

    Re: Have to fix DNS failure after every reboot (22.04)

    First, resolvconf is deprecated and has been for awhile. By using it, you aren't doing it the way 22.04 expects.

    I think by default, 22.04 uses systemd-resolved instead, but I could be wrong. Server and Desktop installations are different when it comes to network setups, so that could be different.

    There is a resolved.conf file, which is how 22.04 systems should be configured. There's a manpage that explains the different settings, but they are commented inside the file and easy enough to understand. I suspect just 2-3 lines need to be modified, then tell resolved service to restart.

    Of course, neither of those are really needed and if you run DNS on your LAN, there's little need for them at all. Just disable both resolvconf and resolved, then delete the /etc/resolv.conf symlink and create a proper /etc/resolv.conf file with the 2-3 lines you want ... like we've done since the early 1990s.

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