16

Is there a simple command to find out which DNS server I'm using right now? Preferably without resorting to tcpdump or parsing log files?

I found a lot of stuff about nm-cli and other nm-tools but that doesn't apply to a server...

OttoEisen
  • 776

2 Answers2

26

nslookup can be used to get the DNS server that is being used.

Example:

$ nslookup www.google.com
Server:     10.0.0.1     <--This is the DNS server address.
Address:    10.0.0.1#53

Non-authoritative answer:
Name:   www.google.com
Address: 216.58.217.36

Hope this helps!

Terrance
  • 43,712
3

For the majority of applications,

less /etc/resolv.conf

should work. Otherwise, you can try,

dig xxxxxxxxx

replacing xxxxxxxx with any server of your choice. You should see what nameserver was used to look it up.

N.B.: Don't be surprised if it is 127.0.0.1 : this is your localhost, which probably means it's your router that is determining your nameserver.

anonymous2
  • 4,325