ip

networksetup -setmanual "Ethernet Adaptor (en1)" 192.168.1.102 255.255.255.0 192.168.1.1
networksetup -setdhcp "Ethernet Adaptor (en1)"

dns

networksetup -listallnetworkservices
#查看网络链接方式，一般macbook都是用的Wifi

networksetup -setdnsservers "Ethernet Adaptor (en1)" 223.5.5.5 223.6.6.6
#切换DNS到8.8.8.8和8.8.4.4

networksetup -setdnsservers "Ethernet Adaptor (en1)" empty
#清空DNS

dscacheutil -flushcache
#清空DNS缓存

cat /etc/resolv.conf
#检查是否设置成功