open my $infile, "<", "test.txt" or die "cannot open input: $!";
my @infile1= <$infile>;
close $infile;
foreach my $dns ( @infile1 ) {
chomp $dns;
if ($dns =~ /(dns:[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$
+/){
my ($ip, $dns1) = split /dns:/, $dns;
($ip) = split /,/, $dns1;
print "$ip";}
}
Perhaps you want something like this:
open my $infile, "<", "test.txt" or die "cannot open input: $!";
while ( my $dns = <$infile> ) {
if ( $dns =~ /dns:([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})
+/ ) {
print "$1";
}
}
close $infile;
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