Linux static-ip-setup

Temporarily:

sudo ip addr add 192.168.1.100/24 dev eth0
sudo ip link set eth0 up
sudo ip route add default via 192.168.1.1

check status:

ip addr show eth0
ip route show

delete:

sudo ip addr del 192.168.1.100/24 dev eth0
sudo ip route del default

networkd:

sudo nano /etc/systemd/network/eth0.network
 
[Match]
Name=eth0
 
[Network]
Address=192.168.1.50/24  
Gateway=192.168.1.1
DNS=192.168.1.1

NetworkManager: no connection:

nmcli device status
sudo nmcli con add type ethernet ifname eth0 con-name NAME ipv4.method manual ipv4.addresses 192.168.1.50/24 ipv4.gateway 192.168.1.1
sudo nmcli con up NAME

if eth0 connected:

nmcli con show
sudo nmcli con mod NAME ipv4.method manual ipv4.addresses 192.168.1.50/24 ipv4.gateway 192.168.1.1
sudo nmcli con up NAME