1. Useful Hadoop Shell Commands & Jobs

2. User Commands Run DFS file system: Usage: hadoop fsck – /

3. FS Shell Commands View file listings: Usage: hadoop fs -ls hdfs :/

4. Usage: hadoop fs -df hdfs :/
Check memory status:
Usage: hadoop fs -df hdfs :/
Count of Directories, Files and Bytes in
specified path and file pattern:
Usage: hadoop fs -count hdfs :/

5. Administration Commands
Format the namenode:
Usage: hadoop namenode -format

6. Starting Secondary namenode: Usage: hadoop secondrynamenode
Run namenode :
Usage: hadoop namenode

7. Hadoop jobs

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