ubuntu 20.04 dns configuration code example

Example 1: ubuntu dns server

# /etc/resolv.conf. A couple of quick entries like 
# so would have my machine reaching the outside world like a champ:

nameserver 8.8.4.4
nameserver 8.8.8.8

Example 2: ubuntu 20.04 how to check dns server

systemd-resolve --status | grep Current