Search Results

nslookup does not produce an error message on stderr or produce a return status when a host is not found. It just reports on stdout that a host could not be found.
You might want to try host instead...

You can try to redirect the output to:

2>/dev/null

You might find it easier to do one at a time, since nslookup dos not do lists as I recall:
for i in $a
do
... $i ....
done
You might use "ping" or "ping -s $i 100 1" if they are supposed to be...

Try...awk '/AUTHORITY SECTION/{getline; print $NF}' file1

It looks like works every time for me, or you have some specific requirement.

$ dig -x 68.142.255.16 +short
ns2.yahoo.com.
$ dig -x 68.180.131.16 +short
ns1.yahoo.com.
$ dig -x...

In my version of "nslookup", the "Name" line contains a colon character not an equals sign. i.e. "Name:" not "Name =".
Please post sample unfiltered output from your "nslookup".


We haven't seen...

What does this do:
nslookup < fileWithout a loop

I think what u are looking for is this :

# dig -x 67.195.160.76 +short
ir1.fp.vip.ac4.yahoo.com.

dig -x 67.195.160.76

; <<>> DiG 9.7.0-P1 <<>> -x 67.195.160.76
;; global options: +cmd
;;...

Afaik. "nslookup" does not search arbitary files.
What did you type?

Oh. Then just print the columns you want:
p != $1 { print $2; } { p = $1; }In awk, the value of the first field is $1, the second is $2, and up to the number of fields (NF) whose value is $NF.
...

Hm???

Here is my attempt:
mdludwig@tgrogdor$ cat datafile
FTP \file\1.rar
HTTP \img\4444443.jpg
HTTP \img\333.jpg
HTTP \img\35553.jpg
FTP \file\hello.rar
FTP \file\thanks_very_much.rar...

With awk:
awk 'p != $1 { print; } { p = $1; }' inputfile

But HTTP \img\333.jpg does not appear in the output?

Can you provide us the contents inputfile (unless it is the same as before), the script you are using, and the contents of the outputfile?

Hi

awk '!a[$2]++{print $1}' file

Guru

awk '{print substr($1,2); }'