Raspberry pi model B v1.1
apt install dnsmasq keepalived
Static IP
nmcli c show
nmcli c mod 'Wired connection 1' ipv4.addresses 192.168.0.21/16 ipv4.method manual
nmcli con mod 'Wired connection 1' ipv4.gateway 192.168.1.1
nmcli con mod 'Wired connection 1' ipv4.dns "192.168.1.1"
nmcli c down 'Wired connection 1' && nmcli c up 'Wired connection 1'