Hi,
is there some problem with the naming of network interfaces?

I have the following lines in my boot log:

Sat Dec 23 10:41:48 2017: [....] Configuring network
interfaces...ifquery: unknown interface eth0
Sat Dec 23 10:41:48 2017: ifup: unknown interface eth0
Sat Dec 23 10:41:48 2017: FAIL failed.

My /etc/network/interfaces contains no eth0:

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

# The loopback network interface
auto lo
iface lo inet loopback