still no clues, since I can't find where resolvconf.service is located.
root@imerabox:/# systemctl list-units | egrep resolvconf.serviceresolvconf.service loaded active exited LSB: Nameserver information manager
root@imerabox:/etc/network# cat interfaces# This file describes the network interfaces available on your system# and how to activate them. For more information, see interfaces(5).# The loopback network interfaceauto loiface lo inet loopbackallow-hotplug eth0iface eth0 inet dhcp dns-nameservers 205.171.3.25 205.171.2.65 dns-search www.duckduckgo.com