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User Commands
archive
Creates a hadoop archive【v.存档; n.档案文件; 档案室; 】. More information can be found at Hadoop Archives.
distcp
Copy file or directories recursively. More information can be found at Hadoop DistCp Guide.
fs
Usage: hadoop fs [GENERIC_OPTIONS] [COMMAND_OPTIONS]
Deprecated【废弃的】, use hdfs dfs instead.
Runs a generic filesystem user client.
fsck
Runs a HDFS filesystem checking utility【功用、效用】. See fsck for more info.
fetchdt
Gets Delegation【n.代表（团）; 委派; 授权; 】 Token from a NameNode. See fetchdt for more info.
jar
Runs a jar file. Users can bundle their Map Reduce code in a jar file and execute it using this command.
job
Command to interact【v.相互作用; 互相影响; 互动; 】 with Map Reduce Jobs.
pipes
Runs a pipes job.
queue
command to interact and view Job Queue information
version
Prints the version.
Usage: hadoop version
CLASSNAME
hadoop script can be used to invoke any class.
Usage: hadoop CLASSNAME
Runs the class named CLASSNAME.
classpath
Prints the class path needed to get the Hadoop jar and the required libraries.
Usage: hadoop classpath