Linux/ip

Install ip tool

apt install iproute2

Add static IP

sudo ip addr add 192.168.1.2/24 dev eth0;
sudo ip route add default via 192.168.1.1 dev eth0;

Remove static IP

sudo ip addr del 192.168.1.2/24 dev eth0;

Bring interface online

ip link set dev <interface> up
ip link set dev <interface> down

Route

Print routes:

ip route

Add default route:

sudo ip route add default via 192.168.1.1 dev eth0;

Add route:

sudo ip route add 172.10.1.0/24 via 192.168.1.1 dev eth0;