# from https://blobfolio.com/2017/fix-linux-dns-issues-caused-by-systemd-resolved/
# edit /etc/resolv.conf

# install unbound:
# Debian/Ubuntu
apt-get install unbound
# Arch
pacman -S unbound

# shut down and disable systemd-resolved:
systemctl stop systemd-resolved
systemctl disable systemd-resolved

# edit /etc/NetworkManager/NetworkManager.conf:
[main]
dns=unbound

# Make sure the Unbound services are enabled:
systemctl enable unbound-resolvconf # not found on Arch
systemctl enable unbound

# Reboot if necessary

# On harmony, it was necessary to delete /etc/resolv.conf
# which was a link to systemd,
# and change to a different Access Point,
# to force NetworkManager to create a new resolv.conf