Ubuntu Server 16.04 DNS

Question

I am setting up a new home server with Ubuntu 16.04 as its OS. I use SSH to access the server for setup. When I SSH into the server with ssh username@192.168.0.10 it just works fine. But when I want to do the same using ssh username@servername or username.servername.localdomainname it just does not work.

I read some topics about this and one stated to edit the /etc/resolv.conf file, but in my installation this file has this line as content: DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN. So, I guess I have to change the settings somewhere else.

How do I set up DNS on Ubuntu Server without installing extra software? I want to keep setup as pure as possible. If I look into the /etc/resolv.conf there are two lines, one is like this: search router.localdomainname and one like this nameserver 192.168.1.1. I read that for the DNS to function, it has to look at 127.0.1.1? What to do to change these settings?

DNS works, for example my router's address can be typed into the address bar of my browser and it functions. Also the server name is present in the static ip table of the router.

So, how does one setup DNS right in a local network on Ubuntu server 16.04?

edit: I have opened the network-manager file, found in /etc/dnsmasq.d/. There is a line of text inside it about network-manager. network-manager is an unknown command (I guess it is a GUI program?) But Ubuntu Server does not have a GUI.

edit2: I have tried this: dnslookup router.localdomain from my server and from my workstation (Ubuntu 16.04 with Unity). the server has router IP as DNS server and the workstation uses 127.0.1.1. the router's DNS name is found by both systems. But when I try to lookup my server's name both systems do not find it.

Thanks for reading my question.

Marcel.

Answer 1

Well, I will answer my own question again since I found an easy way to solve my DNS problem. Installing an DNS server looks too complicated for me and a little overkill for a LAN with only 8 systems. The easy way is to edit the hosts file /etc/hosts. Change dir to /etc. first I copied the file with sudo cp hosts hosts.bak. Then (I like nano) sudo nano hosts. And then just add lines just below the localhost line:

• 192.168.0.20 systemname1
• 192.168.0.21 systemname2

Save the file and that is it. No need to reload or restart something. This I did on all my systems, and I set and configured static DHCP in my router to keep same IP address to same system.

Hope this helps someone.