这两个命令对我来说很好
要停止互联网: ip route del default via 192.168.1.1 dev wlan0
ip route del default via 192.168.1.1 dev wlan0
要重新打开它: ip route add default via 192.168.1.1 dev wlan0
ip route add default via 192.168.1.1 dev wlan0