use Modern::Perl;
use File::Slurp qw/read_file/;
use List::Compare;

my %hash;

my @file1 = map { chomp; lc } read_file 'file1.txt';
my @file2 = map { chomp; lc } read_file 'file2.txt';

my $lc = List::Compare->new( \@file1, \@file2 );

my @file2Only = $lc->get_Ronly;

say for @file2Only;

##</code><code>##

nt64osbld2
nt64osbld3
nt64oscitrix1
ntosbld4
ntosbld5
ntosbld6
vm-osw2k8x64-1
vm-osw2k8x64-2