*hadoop/bin 폴더에서 명령어 실행 (hdfs 쉘 사용)
$ ./hdfs dfs -df [-h] {path}
$ ./hdfs dfs -du [-h] [-s] {directory_path}
$ ./hdfs dfs -ls [-R] {directory_path}
$ ./hdfs dfs -cat {file_path}
$ ./hdfs dfs -mkdir [-p] {folder_path}
$ ./hdfs dfs -cp {source_path} {copy_path}
$ ./hdfs dfs -put {local_path} {source_path}
$ ./hdfs dfs -copyFromLocal {local_path} {source_path}
$ ./hdfs dfs -get {source_path} {local_path}
$ ./hdfs dfs -copyToLocal {local_path} {source_path}
$ ./hdfs dfs -rm {file_path}
$ ./hdfs dfs -rm -r {directory_path}
$ ./hdfs dfs -rmdir {directory_path}
$ ./hdfs dfs -mv {source_path} {destination_path}
nohup + &
로 실행 $ ./hdfs dfsadmin -setBalancerBandwitdh 52428800 #50mb
$ nohup ./hdfs balancer -threshold 2 &