Assign a IP address to specific interface (for interface enp4s0):
ip addr add 192.168.88.5 dev enp4s0
Settings will be lost after a system restart.
Remove an IP address (for interface enp4s0):
ip addr del 192.168.88.5/24 dev enp4s0
Enable network interface:
ip link set enp4s0 up
Disable network interface:
ip link set enp4s0 down