Hadoop - hadoop client utility
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hadoop is a command line application to:
- run a class or a jar
- manage the file system fs
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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)