Now, the data set needs to be put on the HDFS. The best location for data sets that will be used only through WebMapReduce is /user/wmr, since anything in this directory can be specified with a relative path in WMR.

When logged in to your master node (see Section 3.1, “Logging In”), use the following command to put data onto the HDFS:

$ hadoop fs -put local-path hdfs-path

local-path is the name of the file or directory you want to upload, and hdfs-path is the name it will have on the HDFS.