hadoop运行streaming.jar权限不够

/usr/local/hadoop/share/hadoop/tools/lib/hadoop-streaming-2.6.5.jar  \

 -file /home/hadoop/mapper.py    -mapper /home/hadoop/mapper.py \ 

-file /home/hadoop/reducer.py   -reducer /home/hadoop/reducer.py \ 

-input /test/f1 -output /out

bash: /usr/local/hadoop/share/hadoop/tools/lib/hadoop-streaming-2.6.5.jar: 权限不够