export CLASSPATH="/usr/lib/hadoop/*":"/usr/lib/hadoop/lib/*":"/usr/lib/hadoop-0.20-mapreduce/*":"/usr/lib/hadoop-0.20-mapreduce/lib/*":"/usr/lib/hadoop-hdfs/*":"/usr/lib/hadoop-hdfs/lib/*":"/usr/lib/hadoop-mapreduce/*":"/usr/lib/hadoop-mapreduce/lib/*":"/usr/lib/hadoop-yarn/*":"/usr/lib/hadoop-yarn/lib/*":.