I am new to perl programming and trying to learn to do perl way. I have a 300000 lines text files and trying to extract the IP information and remove the duplicate IPs. So far I am getting all the IPs but it doesn't remove the duplicates. Here is the code.

#!/usr/bin/perl
use warnings;
use Regexp::Common qw/net/;
open (NMAP_DATA, "@ARGV") or die "Please type the filename. $!" ;
open (IP_DATA, ">ipdata") or die "can't write to ipdata file";
while (<NMAP_DATA>) {
my @ip_address = sort $1, "\n" if /($RE{net}{IPv4})/;
print IP_DATA @ip_address if (!/^\s*$/);
}
close (IP_DATA) ;
close (NMAP_DATA);

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In reply to How to remove duplicate IPs by sinhass

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