diff --git a/mxnetctl/mxnetctl b/mxnetctl/mxnetctl
index 304641c..8f0bc15 100755
--- a/mxnetctl/mxnetctl
+++ b/mxnetctl/mxnetctl
@@ -4,8 +4,6 @@ use warnings;
 
 use Getopt::Long;
 
-# options
-
 our ($opt_quiet,$opt_noop,$opt_ignore_hw);
 use constant OPTIONS => (
 	'quiet'     => \$opt_quiet,
@@ -24,7 +22,7 @@ options:
 
 __EOF__
 }
- 
+
 sub scandir {
 	my ($dirname)=@_;
 	opendir my $dir,$dirname or die "$dirname: $!\n";
@@ -58,27 +56,23 @@ sub get_hw_address {		# 'eth1' -> '00:1b:21:79:76:67'
 	return slurpfile_chomp($path);
 }
 
-
 our %HW_TO_DEV;		# ( '00:1b:21:79:76:67' => 'net02' , ... )
 our %DEV_TO_HW;		# ('net02'=>'00:1b:21:79:76:67', ... )
 our $CHANGES;
 
-
 sub register_stable {
 	my ($hw,$dev)=@_;
 
 	# force one-to-one mapping, even if file is erroneus
-	
+
 	exists $DEV_TO_HW{$dev} and delete $HW_TO_DEV{$DEV_TO_HW{$dev}};
 	exists $HW_TO_DEV{$dev} and delete $DEV_TO_HW{$HW_TO_DEV{$hw}};
-	
 
 	$HW_TO_DEV{$hw}=$dev;
 	$DEV_TO_HW{$dev}=$hw;
 	$CHANGES++;
 }
 
-
 sub read_mxnet {
 	%HW_TO_DEV=();
 	%DEV_TO_HW=();
@@ -102,12 +96,6 @@ sub write_mxnet {
 			print $mxnet $DEV_TO_HW{$dev},' ',$dev."\n";
 		}
 		print $mxnet "\n";
-
-#		open my $out,'>',"/etc/local/mxnet-udev.rules" or die "/etc/local/mxnet-udev.rules: $!\n";
-#		print $out "# generated ".scalar(localtime)." by $0\n\n";
-#		for my $dev (sort keys %DEV_TO_HW) {
-#			print $out qq'SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="$DEV_TO_HW{$dev}", NAME="$dev"\n';
-#		}
 	}
 }
 
@@ -119,7 +107,6 @@ sub get_unused_name {
 	}
 }
 
-
 sub rename_if {
 	my ($src,$dst)=@_;
 	warn "rename $src to $dst\n" unless $opt_quiet;
@@ -134,7 +121,6 @@ sub rename_if {
 	}
 }
 
-
 sub preferred_device_name {
 	my ($dev,$hw)=@_;
 
@@ -152,21 +138,19 @@ sub preferred_device_name {
 	return $new_dev;
 }
 
-
-
 our $TMP_NUM=0;
 sub out_of_the_way {
 	my ($dev)=@_;		# only 'netXX' or 'ethX' - never 'tmpXX'
-	
+
 	-e "/sys/class/net/$dev/device" or return;
-	
+
 	my $i = $dev=~/(\d+)/;
 	rename_if($dev,sprintf('tmpnet%02d',$TMP_NUM++));
 }
 
 sub start {
 	read_mxnet();
-	
+
 	# 1: rename configured ethX and netXX devices to configured netXX - move away conflicting devices
 
 	for my $dev (grep /^(eth|net)(\d+)/,network_hardware_devices()) {
@@ -186,7 +170,6 @@ sub start {
 		rename_if($dev,$new_dev);
 	}
 
-	#if ($CHANGES || ! -e "/etc/local/mxnet-udev.rules") {
 	if ($CHANGES) {
 		write_mxnet();
 	}
@@ -198,7 +181,6 @@ GetOptions(OPTIONS) or die USAGE;
 
 my ($cmd)=@ARGV;
 
-
 if ($cmd eq 'start') {
 	start();
 } elsif ($cmd eq 'stop') {
@@ -206,11 +188,3 @@ if ($cmd eq 'start') {
 } else {
 	die USAGE;
 }
-
-
-
-
-
-
-
-