Hi, My apology of giving incomplete info. These were the commands I tried. Actually I want to search from every line of my standard output file the word "DOG" and if not found replaced the entire line with the word "Not Found!". I was confused if I will use a conditional statements or simply using search & replace method. And I end up with the solution below: 
#! c:\perl\bin\perl

use Net::Telnet;

@look=$net->cmd("cat $file | grep -i 'DOG' | awk 'NR==1' | nawk '{prin
+t \$2}');
for $find (@look) {
$find =~ s/(^DOG)/\uNot Found!/g;
print "$find\n"; 
}

[download]
I intentionally replaced my standard input file due work related terminologies. =) Tnx so much indeed for your ideas and tips. Br,

In reply to Re^2: Replacing a search/not found pattern with a word by pinpe
in thread Replacing a search/not found pattern with a word by pinpe

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