in /etc/dhcpcd.conf bei debian stretch

interface eth0
static ip_address=192.168.0.10/24
static ip6_address=fd51:42f8:caae:d92e::ff/64
static routers=192.168.0.1
static domain_name_servers=192.168.0.1 8.8.8.8
static domain_search=meine.private.domain.tld

einfügen und rebooten.