sudo /etc/init.d/nscd restart
systemd-resolve --flush-caches
systemd-resolve –statistics
sudo killall -HUP mDNSResponder
sudo discoveryutil udnsflushcaches
sudo dscacheutil -flushcache
sudo lookupd -flushcache
sudo killall -HUP mDNSResponder
sudo killall -HUP mDNSResponder
sudo killall -HUP mDNSResponder
sudo dscacheutil -flushcache;
sudo killall -HUP mDNSResponder