查看打开的所有网卡
networksetup -listallnetworkservices
清空网卡的DNS
networksetup -setdnsservers Wi-Fi empty
查看网卡的DNS
networksetup -getdnsservers Wi-Fi
清空DNS缓存
sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder
查看打开的所有网卡
networksetup -listallnetworkservices
清空网卡的DNS
networksetup -setdnsservers Wi-Fi empty
查看网卡的DNS
networksetup -getdnsservers Wi-Fi
清空DNS缓存
sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder