Common HDFS Commands

| *1. Copy file to HDFS*             | hdfs dfs -put /home/cloudera/localfile.txt /user/cloudera/   
| *2. Copy file from HDFS*           | hdfs dfs -get /user/cloudera/localfile.txt /home/cloudera/   
| *3. List directories/files*        | hdfs dfs -ls /user/cloudera/                                 
| *4. Display file contents*         | hdfs dfs -cat /user/cloudera/localfile.txt                   
| *5. Create a directory*            | hdfs dfs -mkdir /user/cloudera/newdir                         
| *6. Remove directory/file*         | hdfs dfs -rm -r /user/cloudera/newdir                         
| *7. Count number of files*         | hdfs dfs -count /user/cloudera/                               
| *8. Merge files*                   | hdfs dfs -getmerge /user/cloudera/folder/* /home/cloudera/merged.txt
| *9. Concatenate two files in HDFS* | hdfs dfs -cat /user/cloudera/file1.txt /user/cloudera/file2.txt | hdfs dfs -put - /user/cloudera/merged.txt

| *10. Find checksum*                | hdfs dfs -checksum /user/cloudera/localfile.txt