ifconfig
connect to all other IPs (on Ubuntu);
sudo ip address add 10.0.0.0/32 dev tun0
connect to one other IP;
ifconfig tun0 inet 10.0.0.1 10.0.0.2 up
show tun0 IPs (on Ubuntu);
ip address show tun0
add subnet and IP (Ubuntu);
route -n add 10.0.0.0/32 10.0.0.4
delete tun/tap interface;
sudo ip link delete tun
remove tun0;
ifconfig tun0 down
ipconfig set tun0 MANUAL 10.0.0.4 10.0.0.1
install ip;
brew tap brona/iproute2mac
brew install iproute2mac