Dns server bind9, nslookup servername.domainName : connections time out ; no server could be reached

hi, i have a problem with dns server configuration. i have ubuntu server 17.04 in my virtualbox oracle VM then i have configured all files configurations of bind9 then when i try the command nslookup mydomain view some output like that connections time out ; no server could be reached so i suggested that bind is not in service so i try the command "service bind9 reload" the output of this command is bind9.service is not active, cannot reload.
then i try command "service bind9 status" view this output:
● bind9.service - BIND Domain Name Server
Loaded: loaded (/lib/systemd/system/bind9.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2019-03-20 21:40:10 EAT; 3h 35min ago
Docs: man:named(8)


Process: 2701 ExecStop=/usr/sbin/rndc stop (code=exited, status=1/FAILURE)
Process: 2666 ExecStart=/usr/sbin/named -f -u bind (code=exited,status=1/FAILURE)
Main PID: 2666 (code=exited, status=1/FAILURE)
CPU: 89ms

Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.

 

This tutorial shows how to check the zone:
https://www.howtoforge.com/tutorial/setting-up-your-own-name-service-with-ispconfig/#nbsptools