Network Tools, commands

ip addr add ip/subnet dev eth0
# or
sudo dhclient

ip addr del ip/subnet dev eth0
ifconfig ethX 0.0.0.0
sudo dhclient -r

Add route

  sudo route del default
  ip route add default gw
  sudo ip route add default via 192.168.1.254
  sudo route add default gw 192.168.1.254 eth0

  # ip link set dev <interface> up
  # ip link set dev <interface> down
  sudo ip link set dev controller-eth0 up
  
  

  ssh-keygen -l -f /etc/ssh/ssh_host_ecdsa_key.pub