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•  my shell was not bash, I changed it by typing bash -l , type echo $SHELL
• module load tig hadoop
• Wiki Markupgeneric hadoop command: * hadoop command \ [genericOptions\] \ [commandOptions\]*
• Create hadoop FS: hadoop fs -mkdir /user/balewski
• List its content (should be nothing now, but no error) : hadoop  fs -ls

 Exercise 1:  create , load, read back text file to HFS 

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To re-run a job you must first CLEANUP old output files: hadoop dfs -rmr wordcount-opd

Next run Hadoop on 4 reducers : hadoop jar /usr/common/tig/hadoop/hadoop-0.20.2+228/hadoop-0.20.2+228-examples.jar wordcount -Dmapred.reduce.tasks=4   wordcount-in wordcount-op

Some suggestion: change user permision to allow me to read the Hadoop output because Hadopp owns all by default on the Scratch disk
Or use provided script: fixperms.sh /global/scratch/sd/balewski/hadoop/wordcount- gpfs/

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