[root@quickstart cloudera]# hdfs dfs -ls /
Found
9 items
drwxrwxrwx - hdfs
supergroup 0 2016-08-10
14:35 /benchmarks
drwxr-xr-x - hbase
supergroup 0 2016-12-30
22:17 /hbase
drwxr-xr-x - cloudera supergroup 0 2016-12-29 04:31 /pavantest
drwxr-xr-x - cloudera supergroup 0 2016-12-29 04:32 /pavantest1
drwxr-xr-x - cloudera supergroup 0 2016-12-29 04:32 /pavantest2
drwxr-xr-x - solr
solr 0 2016-08-10
14:37 /solr
drwxrwxrwt - hdfs
supergroup 0 2016-12-19
22:39 /tmp
drwxr-xr-x - hdfs
supergroup 0 2016-12-30
23:06 /user
drwxr-xr-x - hdfs
supergroup 0 2016-08-10
14:37 /var
mkdir : Create directory on HDFS
[root@quickstart cloudera]# hdfs
dfs -mkdir /sampledir
[root@quickstart cloudera]# hdfs
dfs -mkdir /user/sampledir1
[root@quickstart cloudera]# hdfs dfs -ls /
Found
10 items
drwxrwxrwx - hdfs
supergroup 0 2016-08-10 14:35
/benchmarks
drwxr-xr-x - hbase
supergroup 0 2016-12-30
22:17 /hbase
drwxr-xr-x - cloudera supergroup 0 2016-12-29 04:31 /pavantest
drwxr-xr-x - cloudera supergroup 0 2016-12-29 04:32 /pavantest1
drwxr-xr-x - cloudera supergroup 0 2016-12-29 04:32 /pavantest2
drwxr-xr-x - root
supergroup 0 2016-12-30
23:18 /sampledir
drwxr-xr-x - solr
solr 0 2016-08-10
14:37 /solr
drwxrwxrwt - hdfs
supergroup 0 2016-12-19
22:39 /tmp
drwxr-xr-x - hdfs
supergroup 0 2016-12-30
23:19 /user
drwxr-xr-x - hdfs
supergroup 0 2016-08-10
14:37 /var
put: Copy data from local FS to HDFS
[root@quickstart cloudera]# hdfs dfs
-put sample.txt /sampledir
[root@quickstart cloudera]# hdfs dfs
-ls /sampledir
Found 1 items
-rw-r--r--
1 root supergroup 75
2016-12-30 23:35 /sampledir/sample.txt
get: Copy data from HDFS to local FS
[root@quickstart cloudera]# pwd
/home/cloudera
[root@quickstart cloudera]# hdfs dfs -get /sampledir/sample.txt
/home/cloudera
[root@quickstart cloudera]# ls
cloudera-manager Documents
enterprise-deployment.json
file2.txt longmsg.txt Pictures
Templates
cm_api.py Downloads express-deployment.json kerberos
Music Public Videos
Desktop eclipse file1.txt lib parcels sample.txt workspace
cat: View content of a file on HDFS.
[root@quickstart cloudera]# hdfs dfs -cat /sampledir/sample.txt
this
is the file i wanto put in hsdfs
saaaaadasdsadsad
asdsadsadsadsadasda
cp:
Copy data
from HDFS to HDFS
[root@quickstart
cloudera]# hdfs dfs -cp /sampledir/sample.txt
/pavantest/
[root@quickstart cloudera]# hdfs dfs -ls /pavantest/
Found
1 items
-rw-r--r-- 1 root supergroup 75 2016-12-31 00:06 /pavantest/sample.txt
mv:
similar to Unix mv command, it is used
for moving a file from one directory to another within HDFS.
[root@quickstart cloudera]# hdfs dfs -ls /pavantest/
Found
1 items
-rw-r--r-- 1 root supergroup 75 2016-12-31 00:06
/pavantest/sample.txt
[root@quickstart cloudera]# hdfs dfs -mv /pavantest/sample.txt
/pavantest1/
[root@quickstart cloudera]# hdfs dfs -ls /pavantest/
[root@quickstart cloudera]# hdfs dfs -ls /pavantest1/
Found
1 items
-rw-r--r-- 1 root supergroup 75 2016-12-31 00:06
/pavantest1/sample.txt
rm: Delete data from HDFS
[root@quickstart cloudera]# hdfs dfs -ls /pavantest1/
Found
1 items
-rw-r--r-- 1 root supergroup 75 2016-12-31 00:06 /pavantest1/sample.txt
[root@quickstart cloudera]# hdfs dfs -rm /pavantest1/sample.txt
Deleted /pavantest1/sample.txt
[root@quickstart cloudera]# hdfs dfs -ls /pavantest1/
