You have installed bind9, and told it to have resolvconf update resolv.conf when it starts. You'll want to edit /etc/default/bind9 to say 'RESOLVCONF=no', and then starting bind9 will not rewrite resolv.conf
You have installed bind9, and told it to have resolvconf update resolv.conf when it starts. You'll want to edit /etc/default/bind9 to say 'RESOLVCONF=no', and then starting bind9 will not rewrite resolv.conf