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The following page has been changed by JoeMontanez: http://wiki.apache.org/hadoop/WordCount The comment on the change is: bin/hadoop dfs -copyFromLocal <local-dir> <hdfs-dir> will create <hdfs-dir> ------------------------------------------------------------------------------ bin/hadoop jar hadoop-*-examples.jar wordcount [-m <#maps>] [-r <#reducers>] <in-dir> <out-dir> All of the files in the input directory (called in-dir in the command line above) are read and the counts of words in the input are written to the output directory (called out-dir above). It is assumed that both inputs and outputs are stored in HDFS (see ImportantConcepts). If your input is not already in HDFS, but is rather in a local file system somewhere, you need to copy the data into HDFS using a command like this:[[BR]] + bin/hadoop dfs -mkdir <hdfs-dir> bin/hadoop dfs -copyFromLocal <local-dir> <hdfs-dir> + As of version 0.17.2.1, use a command like this: + bin/hadoop dfs -copyFromLocal <local-dir> <hdfs-dir> + + Word count supports generic options : see DevelopmentCommandLineOptions
