How to disable systemd-resolved and resolve DNS with dnsmasq?

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Ubuntu 16.10+ uses systemd-resolved as DNS resolver.

I prefer the setup 16.04 uses, dnsmasq as the resolver.

How can I do that on 16.10+, especially on 17.04?

Answer

dnsmasq packages are still available in 16.10 and 17.04.

  1. Install dnsmasq and dependencies (or at least download their packages) before disabling systemd-resolved:

    sudo apt-get install dnsmasq

  2. Disable systemd-resolved and verify dnsmasq is running:

    sudo systemctl stop systemd-resolved
sudo systemctl disable systemd-resolved

systemctl status dnsmasq

  3. Season dnsmasq to taste. After applying your settings, restart dnsmasq:

    sudo systemctl stop dnsmasq
sudo systemctl start dnsmasq

After step 2 you might be without a working system resolver until step 3 is complete. You may need to restart the networking subsystem (or simply reboot) to get dnsmasq functioning with the default configs. In my testing, adding a known DNS server to /etc/dnsmasq.conf and restarting dnsmasq was enough to get it working in a liveCD environment.

Attribution
Source : Link , Question Author : Artyom , Answer Author : quixotic

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