Hadoop - hadoop client utility

hadoop is a command line application to:

• run a class or a jar
• manage the file system fs

hadoop [--config confdir] [COMMAND | CLASSNAME]

where:

• CLASSNAME - run the class named CLASSNAME
• COMMAND is one of:
  • fs run a generic filesystem user client. HDFS - Fs Shell
  • version print the version
  • jar <jar> run a jar file. See Hadoop - Jar (Launch a java application)
  • checknative [-a|-h] check native hadoop and compression libraries availability
  • distcp copy file or directories recursively. HDFS - DistCp (distributed inter/intra-cluster copy)
  • envvars display computed Hadoop environment variables
  • archive create a hadoop archive. HDFS - Hadoop Archive file (har)
  • classpath prints the class path needed to get the Hadoop jar and the required libraries
  • credential interact with credential providers Hadoop - Authentication
  • daemonlog get/set the log level for each daemon
  • trace view and modify Hadoop tracing settings. Hadoop - Diagnostic (Tracing)

• Hadoop Distributed File System (HDFS)

• 2.9 reference