Rasp network, seems work with

  networking

    /etc/network/interfaces

    不可以有dhcp & static ip的操作, 不然dhcpcd會跳掉

  dhcpcp

    /etc/dhcpcd.conf

 networking / dhcpcp可以用的語法/詞組, 慢慢自行大數據...唉

interface eth0

allow-hotplug eth0

iface eth0 inet anual

auto eth0

post-up

post-down

sudo systemctl status AAA

sudo systemctl start AAA

#set boot and auto run

sudo systemctl enable AAA

/etc/network/interfaces

    sudo systemctl status networking

/etc/dhcpcd.conf

    sudo systemctl status dhcpcd