§2024-10-10

• Debian Bookwork

1. modified /etc/network/interfaces

# 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 eth0
iface eth0 inet dhcp

• original /etc/network/interfaces.backup

# 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 end0
iface end0 inet dhcp

add interface dhcp auto, not needed any more

• add this file /etc/network/interfaces.d/20-wirednetwork

auto eth0
iface eth0 inet dhcp

• then sudo systemctl restart networking