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creating script to perform a nslookup on all servers

 
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# 1  
Old 06-23-2010
creating script to perform a nslookup on all servers
Hi All

i am trying to create a script (in tcsh) to do a nslookup on all the hosts i have here... can anyone help me?

Kind regards.

Brian
# 2  
Old 06-23-2010
Create a file that contains the names of all the host names (one host name per line) and then:
Code:
nslookup < file

# 3  
Old 06-23-2010
thank you for that... it was helpful. But i have a problem, what my goal is to retrieve all the hosts that have reverse PTR enabled. so i need to put all the hosts that have PTR enabled in one file, and then all the hosts that are not enabled into another file. so i can give this to our network guy to sort out. can you help?
# 4  
Old 06-23-2010
Hi, try if this works:
Code:
sh
nslookup < infile 2>/dev/null | awk '/Address/&&!/#/{print $2}' | nslookup -

Execute sh first, since this will not work from tcsh

or create a script with:
Code:
#!/bin/sh

on the first line
Last edited by Scrutinizer; 06-23-2010 at 08:25 AM..
# 5  
Old 06-23-2010
okay... sorry i am not following you with that one... how will i get all my hosts IP's into that? sorry... this has had me stumped for days now.
# 6  
Old 06-23-2010
The first nslookup and awk produce a list of all the ip addresses that belong to your hosts. This list then gets fed into the second nslookup that tries to perform a reverse lookup and see if it can find the host names. If it can't for a particular host, you know that PTR record is not defined..
# 7  
Old 06-23-2010
thank you very much... this helps tons! thank you
 
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