Systemd

User service to start on reboot

• https://unix.stackexchange.com/questions/251211/why-doesnt-my-systemd-user-unit-start-at-boot

Add forwarding servers

vim /etc/systemd/resolved.conf

DNS=8.8.8.8 8.8.4.4 2001:4860:4860::8888 2001:4860:4860::8844
#Disabling
#DNSStubListener=no
#Cache=no

systemd-resolved

/etc/resolv.conf

nameserver 127.0.0.53
options edns0
search example.io

Disable systemd-resolved

/etc/systemd/resolved.conf

[Resolve]
DNSStubListener=no
Cache=no

/etc/resolv.conf

nameserver 10.x.x.1

or disable another way

ou can always disable your systemd-resolved by

systemctl disable systemd-resolved.service

command. And run:

sudo rm /etc/resolv.conf && sudo ln -s /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf

to use /etc/resolv.conf config as it was earlier in previous ubuntu versions.