diff --git a/plugins/hadoop/hadoop-dfs-plugin b/plugins/hadoop/hadoop-dfs-plugin
index 52075e59..4d1a4c7c 100755
--- a/plugins/hadoop/hadoop-dfs-plugin
+++ b/plugins/hadoop/hadoop-dfs-plugin
@@ -9,13 +9,21 @@
 # Symlink this file to hadoop_hdfs_block or hadoop_hdfs_capacity to get block
 # or capacity informations about the DFS.
 #
+#
+# Needs following minimal configuration in plugin-conf.d/munin-node:
+# [hadoop_hdfs_block]
+# user hdfs
+#
+# [hadoop_hdfs_capacity]
+# user hdfs
+#
 # Author: KARASZI Istvan <muninexchange@spam.raszi.hu>
 #
 
 use strict;
 use File::Basename qw(basename);
+use Munin::Plugin;
 
-my $hdfs_user = "hdfs";
 
 #
 # main
@@ -96,7 +104,7 @@ sub getCapacity {
 }
 
 sub getStatistics {
-	open(DFSADMIN, "sudo -u $hdfs_user hdfs dfsadmin -report|") || die("Cannot open dfsadmin: $!");
+	open(DFSADMIN, "hdfs dfsadmin -report|") || die("Cannot open dfsadmin: $!");
 	while(defined(my $line = <DFSADMIN>)) {
 		chomp($line);