Install unbound-anchor by entering the following commands in the terminal:
sudo apt update sudo apt install unbound-anchor
Description:
utility to securely fetch the root DNS trust anchor
unbound-anchor is a utility which securely fetches or updates the root DNS zone trust anchor. A copy of the current root anchor and root update certificate is embedded in unbound-anchor. RFC 5011 trust anchor tracking is performed, with fallback to an SSL fetch if this fails.
Homepage: https://www.unbound.net/
Version: 1.6.7-1ubuntu2
Section: universe/net