mapreduce - Add custom location in hadoop classpath -

i using cloudera hadoop 5.3.3.

here hadoop class path command output.

bash> hadoop classpath /etc/hadoop/conf:/usr/lib/hadoop/lib/*:/usr/lib/hadoop/.//*:/usr/lib/hadoop-hdfs/./:/usr/lib/hadoop-hdfs/lib/*:/usr/lib/hadoop-hdfs/.//*:/usr/lib/hadoop-yarn/lib/*:/usr/lib/hadoop-yarn/.//*:/usr/lib/hadoop-0.20-mapreduce/./:/usr/lib/hadoop-0.20-mapreduce/lib/*:/usr/lib/hadoop-0.20-mapreduce/.//* 

thought hadoop psudo node cluster working fine, following prints nothing.

bash> echo $hadoop_classpath 

i want add custom location in hadoop classpath. how that?

export hadoop_classpath=/to/custom/location:$hadoop_classpath;

even hadoop_classpath echo nothing @ start works me , custom class path added hadoop class path.