[hadoop@master ~]$
[hadoop@master ~]$ hadoop jar /opt/hadoop-2.5.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.5.2.jar pi 100 100
Error creating temp dir in hadoop.tmp.dir /home/hadoop/tmp due to 权限不够
[hadoop@master ~]$
解决方法:
sudo chmod a+rwx /home/hadoop/tmp
hadoop2.5.2 运行实例 /home/hadoop/tmp due to 权限不够
原文：http://my.oschina.net/u/189445/blog/522876