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The following page has been changed by YoramArnon:
http://wiki.apache.org/lucene-hadoop/hadoop-0%2e1-dev/bin/hadoop_dfs

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  exactly one additional argument must be specified.
  A word about paths: a path may be relative or absolute. An absolute path starts with a '/', a relative path does not, and always relates to /user/<currentUser>. There is no notion of current working directory.
  
- -ls: list the contents of the specified path. If path is not specified, the contents of /user/<currentUser> will be listed. The output contains one line of the form
+ -ls <path>: list the contents of the specified path. If path is not specified, the contents of /user/<currentUser> will be listed. The output contains one line of the form
   Found n items
  followed by one line per directory and one line per file.  Directory entries are of the form and file entries are of the form
   fileName   <r n>   size
  where n is the number of replicas specified for the file and size is the size of the file, in bytes.
  
- -lsr: recursively list the contents of the specified path. Behaves very similarly to hadoop dfs -ls, except that the first line (Found n items) is omitted, and data is produces for all the entries in the subtree.
+ -lsr <path>: recursively list the contents of the specified path. Behaves very similarly to hadoop dfs -ls, except that the first line (Found n items) is omitted, and data is produces for all the entries in the subtree.
  
+ -du <path>: show the amount of space, in bytes, used by given path. Equivalent to the unix command "du -sb <path>/*" in case of a directory, and to "du -b <path>" in case of a file
+ 
+ -mv <src> <dst>: move a file or directory from one location in dfs to another. Equivalent to the Unix command mv <src> < dst>
+ -cp <src> <dst>: copy a file or directory from one location in dfs to another. Equivalent to the Unix command cp -rf <src> < dst>
+ -rm <src>: remove a file or directory. Equivlent to the Unix command "rm -rf <src>".
+ -put <localsrc> <dst>: copy a single file from the local file system into dfs.
+ -copyFromLocal <localsrc> <dst>: identical to the -put command
+ -moveFromLocal <localsrc> <dst>: same as -put, except that the source is deleted after it's copied.
+ -get <src> <localdst>] [-cat <src>:
+ -copyToLocal <src><localdst>: copy a single file from dfs to a local file
+ -moveToLocal <src> <localdst>: not implemented yet
+ -mkdir <path>:
+ -report:
+ -setrep [-R] <rep> <path/file>
+