HDFS frequently used commands

ram@ram:~$ hadoop fsck /
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.

15/07/20 20:30:02 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Connecting to namenode via http://localhost:50070/fsck?ugi=ram&path=%2F
FSCK started by ram (auth:SIMPLE) from /127.0.0.1 for path / at Mon Jul 20 20:30:04 IST 2015
Status: HEALTHY
 Total size:    0 B
 Total dirs:    2
 Total files:    0
 Total symlinks:        0
 Total blocks (validated):    0
 Minimally replicated blocks:    0
 Over-replicated blocks:    0
 Under-replicated blocks:    0
 Mis-replicated blocks:        0
 Default replication factor:    3
 Average block replication:    0.0
 Corrupt blocks:        0
 Missing replicas:        0
 Number of data-nodes:        1
 Number of racks:        1
FSCK ended at Mon Jul 20 20:30:04 IST 2015 in 3 milliseconds


The filesystem under path '/' is HEALTHY

ram@ram:~$ hadoop fs -copyFromLocal /home/ram/Documents/1.log /user
ram@ram:~$ hadoop fs -ls /userFound 1 items
-rw-r--r--   3 ram supergroup      50270 2015-07-20 20:34 /user/1.log

ram@ram:~$ hadoop fs -copyToLocal /user/1.log ~/15/07/20 20:36:38 WARN hdfs.DFSClient: DFSInputStream has been closed already

ram@ram:~$ ls1.log  Desktop  Documents  Downloads  examples.desktop  Music  Pictures  Public  Templates  Videos  zookeeper

ram@ram:~$ hadoop fs -setrep -w 3 /user/1.logReplication 3 set: /user/1.log

ram@ram:~$ hadoop fs -cat /user/1.log
ram@ram:~$ hadoop fs -du /user
50270  /user/1.log


ram@ram:~$ hadoop fs -ls hdfs://localhost:9000/Found 2 items
drwxrwxr-x   - ram supergroup          0 2015-07-20 21:45 hdfs://localhost:9000/tmp
drwxr-xr-x   - ram supergroup          0 2015-07-20 21:43 hdfs://localhost:9000/user
ram@ram:~$