Question
How to permanently change DNS nameservers in Ubuntu 18.04.3? Wiki article is not working.
- Posted on November 23, 2019
- Ubuntu 18.04DNS
Asked by Aerience
Hello,
I am trying to permanently change the DNS nameserver being using on my droplet.
I following this article: https://www.digitalocean.com/community/questions/how-do-i-switch-my-dns-resolvers-away-from-google
But the permanent fix option is not working.
The file “/etc/network/interfaces.d/50-cloud-init.cfg” does not exist. And when I add nameservers to the file “/etc/network/interfaces” and restart the droplet, no change occurs. The file is saved, but the DNS server being used are still the default ones.
My “/etc/network/interfaces” file looks like the following:
auto lo
iface lo inet loopback
source /etc/network/interfaces.d/*
dns-nameservers 208.67.222.222 208.67.220.220
Am I missing something? I am new to Linux.
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Hello,
With the older Ubuntu distributions, you could do that with the /etc/resolv.conf however, with Ubuntu 18.04 you should make the change in the netplan configs at /etc/netplan/*.yaml files.
The file would look something like this:
network:
version: 2
ethernets:
eth0:
addresses:
- 123.123.123.123/20
- 10.0.0.0/16
gateway4: 123.123.123.1
match:
macaddress: cc:8c:11:e1:1b:81
nameservers:
addresses:
- 8.8.8.8
- 8.8.4.4
search: []
set-name: eth0
To change your nameservers, just update the addresses under the nameservers section. And then run:
sudo netplan apply
Hope that this helps! Regards, Bobby
Want to learn more? Join the DigitalOcean Community!
Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.
Just to point out for servers:
For persistence through reboots, you must create a file to stop cloudinit from resetting 50-cloud-init.yaml… (tested on ubuntu 20 server on DO today)
Copied from the default /etc/netplan/50-cloud-init.yaml : This file is generated from information provided by the datasource. Changes to it will not persist across an instance reboot. To disable cloud-init’s network configuration capabilities, write a file /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following: network: {config: disabled}
*** Info: The actual addresses will be nameservers rather than redirects to resolvconf, so no 8.8.8.8 etc in the yaml file.