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Feb 16, 2015 · Test DNS Using Ubuntu Client. The primary and secondary DNS servers have now been deployed, so it is time to test name and IP address resolution. We will use a third Ubuntu 14.04 Server configured to query our two new servers. Configure Test Client Networking. Connect to the host1 host (10.1.100.90) via SSH. Edit the network interfaces May 14, 2020 · This will set your primary DNS server. From our example above, we changed the IP address for the “Wi-Fi” interface, so we’ll use the same example to change DNS servers. For purposes of this guide, we’ll use Google’s primary public DNS server, 8.8.8.8. By all means be critical of my comment on the difficulty of changing DNS in Ubuntu 9.10. But in doing so, say how to do it. So far as I can tell, there is no GUI in 9.10 for changing DNS, and I have changed DNS frequently in Windows and other Linux OS / earlier Ubuntu OS. Google the subject. Look at the results. Testing the DNS server with dig & nslookup. To test out our BIND 9 DNS server, we will use another Ubuntu machine & will change its DNS to point out our DNS server. To change the DNS server, open ‘/etc/resol.conf‘ & make the following DNS entry, [email protected]:~$ sudo vi /etc/resolv.conf search linuxtechi.local nameserver 192.168.0.40 In this way, DNS alleviates the need to remember IP addresses. Computers that run DNS are called name servers. Ubuntu ships with BIND (Berkley Internet Naming Daemon), the most common program used for maintaining a name server on Linux. Installation. At a terminal prompt, enter the following command to install dns: sudo apt install bind9