Please bear with me because I'm very new to using linux.
I'm trying to set my dns server on a clean install of ubuntu 18.04 but I can't seem to make it work. I just need to be able to ping my domain controller by hostname. Our dhcp server hands out a different dns than our primary domain controller so it must be set manually on devices (complex situation, has to be this way, don't ask) I:
1) installed ubuntu 18.04 LTS and did updates with software updater
2) went into settings > network > ipv4 > turned off automatic dns > and then set my dns servers (first ip is my primary domain controller, second ip is my secondary domain controller)
3) disabled ipv6
I can ping my domain controller by ip, but not by hostname. If I nslookup my domain controller by hostname, it resolves with the correct dns server. I've had no issues on other linux distros, or on windows machines or osx machines.
My /etc/hosts file is as follows
127.0.0.1 localhost 127.0.1.1 my-machines-hostname
Any ideas here? Thanks in advance. Apologies because this is a probably a dumb question with a dumb answer, but I've tried googling. :p