• hadoop fs -ls
• hadoop fs -put file.txt
• hadoop fs -get file.txt
• hadoop fs -tail file.txt
• hadoop fs -cat file.txt
• hadoop fs -mv
• hadoop fs -rm
• hadoop fs -mkdir
• hadoop jar some/long/path.java  -mapper mapper.py -reducer reducer.py -file mapper.py -file reducer.py -input inputdir -output outputdir