Networking.net

>> /etc/network/interfaces

#STATIC [Debian 12 Bookworm]
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface with static IP
allow-hotplug ens33
iface ens33 inet static
    address 192.168.18.140
    netmask 255.255.255.0
    gateway 192.168.18.2
    dns-nameservers 192.168.18.2 1.1.1.1 8.8.4.4
    dns-domain guler.com


#DHCP [Debian 12 Bookworm]
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug ens33
iface ens33 inet dhcp