How to change DNS settings on Linux

Follow this quick guide to start using DNS.SB on your Linux device.

Debian

The guide for Debian also works with most common Linux distributions

1. Open /etc/resolv.conf

$sudo vim /etc/resolv.conf

2. Replace the nameserver lines with

• For IPv4

nameserver 185.222.222.222
nameserver 45.11.45.11

• For IPv6

nameserver 2a09::
nameserver 2a11::

You can also lock this file for security purpose

sudo apt install e2fsprogs -y
sudo chattr +i /etc/resolv.conf

Or unlock it with sudo chattr -i /etc/resolv.conf

Ubuntu 18.04 and later

Since Ubuntu 18.04, you shoud make the change in netplan configs at /etc/netplan/*.yaml, this file could be 50-cloud-init.yaml or something like 01-netcfg.yaml

Open this file and it looks like

network:
    version: 2
    ethernets:
        eth0:
            addresses:
            - 192.0.2.2/24
            gateway4: 192.0.2.1/24
            match:
                macaddress: 01:23:45:67:89:AB
            nameservers:
                addresses:
                - 198.51.100.1
                - 203.0.113.1
                search: []
            set-name: eth0

Replace the nameservers section with

nameservers:
  addresses:
  - 185.222.222.222
  - 45.11.45.11

Then run the following command

sudo netplan apply

You can check your current DNS assignment by running the systemd-resolve command

systemd-resolve --status