In Ubuntu how can I find out the DNS servers used from the command line?

Question

I need to know the addresses and ports of the Ubuntu DNS servers. How can I do this from the command line?

Tom Shaw · Accepted Answer · 2011-06-08 10:52:29Z

up vote 4 down vote accepted

Command-line: $ cat /etc/resolv.conf

DNS servers listen by convention on port 53 TCP or UDP; UDP is used for most requests.

answered Jun 8 '11 at 10:52

Tom Shaw
2,523110

quanta · Answer 2 · 2012-09-26 07:10:27Z

up vote 2 down vote

If you mean your local dns servers:

cat /etc/resolv.conf

and for information as to what port a general service runs on you can grep /etc/services for dns

If you mean the ubuntu DNS servers for the domain just use nslookup

edited Sep 26 '12 at 7:10

quanta
25.9k22681

answered Jun 8 '11 at 10:58

plaix
633

Iain · Answer 3 · 2012-09-26 07:12:49Z

up vote 2 down vote

Command-Line:

nm-tool | grep DNS

edited Sep 26 '12 at 7:12

Iain♦
51.7k54399

answered Sep 26 '12 at 7:10

Vladimir
211

3 Answers