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creating script to perform a nslookup on all servers

 
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Old 06-23-2010
If this is a local DNS which you have permissions to look at it, you can use nslookup in interactive mode to view the DNS records. See "man nslookup" and review the "ls" command. The "ls -t PTR domain_name" seems to be relevant when compared with just "ls domain_name". There is much variation in the syntax an behaviour of "nslookup" and there is no substitute for reading the manual and trying out read-only commands. The command "nslookup" is being phased out in favour of "dig" but many mainstream Operating Systems still have "nslookup".

I have not been successful in scripting this type of nslookup for multiple enquiries because of the unusual way nslookup drives the terminal but for a single enquiry standard output redirect "> filename" works from the command line in my version.

In any enquiries about machine-specific elements such as comms or hardware it always helps to state the precise Operating System and version.
 
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LEARN ABOUT SUNOS

nslookup

nslookup(1M)						  System Administration Commands					      nslookup(1M)

NAME

       nslookup - query Internet name servers interactively

SYNOPSIS

       nslookup [-option] [name | -]  [server]

DESCRIPTION

       The  nslookup  utility  is  a program to query Internet domain name servers. It has two modes: interactive and non-interactive. Interactive
       mode allows the user to query name servers for information about various hosts and domains or to print a list of hosts in  a  domain.  Non-
       interactive mode is used to print just the name and requested information for a host or domain.

PARAMETERS

       Interactive mode is entered in the following cases:

       1.  No arguments are given (the default name server is used).

       2.  The first argument is a hyphen (-) and the second argument is the host name or Internet address of a name server.

       Non-interactive	mode  is  used	when the name or Internet address of the host to be looked up is given as the first argument. The optional
       second argument specifies the host name or address of a name server.

       Options can also be specified on the command line if they precede the arguments and are prefixed with a hyphen. For example, to change  the
       default query type to host information, and the initial timeout to 10 seconds, type:

       nslookup -query=hinfo  -timeout=10

INTERACTIVE COMMANDS

       host  [server]  Look up information for host using the current default server or using server, if specified. If host is an Internet address
		       and the query type is A or PTR, the name of the host is returned. If host is a name and does not have  a  trailing  period,
		       the search list is used to qualify the name.  To look up a host not in the current domain, append a period to the name.

       server domain   Change the default server to domain; lserver uses the initial server to look up information about domain, while server uses
       lserver domain  the current default server. If an authoritative answer can't be found, the names of servers that might have the answer  are
		       returned.

       root	       Not implemented.

       finger	       Not implemented.

       ls	       Not implemented.

       view	       Not implemented.

       help	       Not implemented.

       ?	       Not implemented.

       exit	       Exits the program.

       set keyword[=value]

	   This command is used to change state information that affects the lookups. Valid keywords are:

	   all		   Prints  the current values of the frequently used options to set. Information about the current default server and host
			   is also printed.

	   class=value	   Change the query class to one of:

			   IN	    the Internet class

			   CH	    the Chaos class

			   HS	    the Hesiod class

			   ANY	    wildcard

			   The class specifies the protocol group of the information.  (Default = IN; abbreviation = cl)

	   [no]debug	   Turn debugging mode on. More information is printed about the packet sent to  the  server  and  the	resulting  answer.
			   (Default = nodebug; abbreviation = [no]deb)

	   [no]d2	   Turn debugging mode on. A lot more information is printed about the packet sent to the server and the resulting answer.
			   (Default = nod2)

	   domain=name	   Sets the search list to name.

	   [no]search	   If the lookup request contains at least one period but doesn't end with a trailing period, append the domain  names	in
			   the domain search list to the request until an answer is received.  (Default = search)

	   port=value	   Change the default TCP/UDP name server port to value.  (Default = 53; abbreviation = po)

	   querytype=value Change the top of the information query.  (Default = A; abbreviations = q, ty)
	   type=value

	   [no]recurse	   Tell  the  name  server to query other servers if it does not have the information.	(Default = recurse; abbreviation =
			   [no]rec)

	   retry=number    Set the number of retries to number.

	   timeout=number  Change the initial timeout interval for waiting for a reply to number seconds.

	   [no]vc	   Always use a virtual circuit when sending requests to the server.  (Default = novc)

FILES

       /etc/resolv.conf        resolver configuration file

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWbind9 		   |
       |Interface Stability	     |External			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       dig(1M), host(1M), named(1M), attributes(5)

NOTES

       Source for BIND9 is available in the SUNWbind9S package.

SunOS 5.10							    15 Dec 2004 						      nslookup(1M)