open my $IN, "<", $awsLists or die "could not open $awsLists $!";
my %hash = map { chomp; $_ => 1 } <$IN>;
close $IN;
chomp @command; # just in case you need it. Note: you could choose a better name for your array
$hash{$_} = 1 for @command;     
open my $OUT, ">", "$awsLists.out" or die "could not open $awsLists.out $!";
print "$_\n" for keys %hash;
close $OUT;