[isp-dns] Re: script to list nameservers

["Patrick Giagnocavo +1.717.201.3366" <patrick@...>]

On Tue, Jun 01, 2004 at 11:57:11AM -0400, Andrew P. Kaplan wrote:
> Does anyone have a script that I can run against my 1000 domains on my
> master server that would list domain name and authorative name servers. My
> slave servers is going off line soon and I have been moving the nameserver,
> but use a range of registrars with some being out of my control so I need a
> list of domains that still have the old nameservers.
> 
> Thank you.
> 
> Andrew P. Kaplan
> www.cshore.com

Hi Andrew,

Yes, you can use dig.

e.g.

dig zill.net | grep NS | grep -v ";;"

gives:

zill.net.       255324  NS      ns3.zill.net.
zill.net.       255324  NS      ns1.zill.net.
zill.net.       255324  NS      ns2.zill.net.

Explanation: dig ns example.com gives you a lot of information, so you
use grep to only find the NS (nameserver) lines.  There are comments
that start with ";;" so you pipe it to grep again to tell it to ignore
those comments.

If you want to get fancier, just add more grep or grep -v commands.
For instance, if you want to ignore those cases where the proper DNS
is listed, add "grep -v mydns" where mydns is your nameserver.

Cordially
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