Monitor DNS query time
{ while true; do dig google.com | kazy -i "Query time" | kazy -r -x "[\d.]*"; sleep 1; done } | ttyplot -t "dig to google.com"
dns/
Wait until DNS propagates
until [[ -n $(dig new.mydomain.com A +short @1.1.1.1) ]]; do echo "waiting..." && sleep 5; done
-n flag stands for non-empty string
Check DNS propagation worldwide
Service from Constellix: DNS Propagation