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Apache Accumulo for Developers by Guðmundur Jón Halldórsson

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Appendix B. Hadoop Command References

The commands for Hadoop are as follows:

Command

Description

User commands

 

archive

Creates a Hadoop archive

distcp

Copies files or directories recursively

fs

Runs a generic filesystem user client

fsck

Runs an HDFS filesystem checking utility

fetchdt

Gets the delegation token from a NameNode

jar

Runs a JAR file

job

Lets you interact with Map/Reduce jobs

pipes

Runs a pipes job

queue

Lets you interact with and view job queue information

version

Prints the version

classpath

Prints the class path needed to get the Hadoop JAR files and the required libraries

Administration commands

 

balancer

Runs a cluster balancing utility

daemonlog

Lets you get/set ...

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