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Hostname lookup and create text file

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# 1  
Old 03-20-2014
Hostname lookup and create text file
I have a list of hostnames in a txt file . I need to do nslookup or other command on linux and get the ip address and if you dont find an ip address then put 0.0.0.0 instead in the output text file along with the hostname.

So input
Code:
host1
host2
host2.dd.ddd.net

Output
Code:
host1, 10.136.21.2
host2,10.127.1.2
host2.dd.ddd.net,0.0.0.0

thanks
G
Last edited by Scott; 03-20-2014 at 05:31 AM.. Reason: CODE tags instead of ICODE tags
# 2  
Old 03-20-2014
Using the host command:

Code:
$ cat myScript
while read HOST x; do
  IPS=$(host -t A "$HOST" | awk '/has address/ { IP=IP","$NF } END { print IP?IP:",0.0.0.0" }')
  echo "$HOST$IPS"
done < hosts.txt > hosts.new.txt

$ ./myScript

$ cat hosts.txt
bbc.co.uk
google.com
ns1.scottn.adm
vmc.scottn.vm
vmd
blah_blah

$ cat hosts.new.txt
bbc.co.uk,212.58.244.18,212.58.246.104,212.58.244.20,212.58.246.103
google.com,173.194.116.70,173.194.116.64,173.194.116.65,173.194.116.73,173.194.116.66,173.194.116.67,173.194.116.68,173.194.116.69,173.194.116.78,173.194.116.71,173.194.116.72
ns1.scottn.adm,10.10.10.100
vmc.scottn.vm,10.10.10.173
vmd,10.10.10.174
blah_blah,0.0.0.0

(Change 'IP=IP","$NF' to 'print ","$NF; exit' in the main action, and remove the END clause, to store only the first IP address)
# 3  
Old 03-21-2014
Awesome...you rock!
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