Pig - Hadoop: The Definitive Guide - page 527

Table 16-4. Pig Latin commands

Category Command Description

Hadoop filesys-
tem

Prints the contents of one or more files cat

Changes the current directory

cd

copyFromLocal Copies a local file or directory to a Hadoop filesystem

copyToLocal Copies a file or directory on a Hadoop filesystem to the local filesys-
tem

Copies a file or directory to another directory

cp

Accesses Hadoop's filesystem shell

fs

Lists files

ls

Creates a new directory

mkdir

Moves a file or directory to another directory

mv

Prints the path of the current working directory

pwd

Deletes a file or directory rm

Forcibly deletes a file or directory (does not fail if the file or direct-
ory does not exist)

rmf

Hadoop
MapReduce

Kills a MapReduce job kill

Utility Clears the screen in Grunt

clear

Runs a script in a new Grunt shell in batch mode

exec

Shows the available commands and options help

Prints the query statements run in the current Grunt session

history

quit ( \q ) Exits the interpreter

Runs a script within the existing Grunt shell

run

Sets Pig options and MapReduce job properties

set

Runs a shell command from within Grunt

sh

The filesystem commands can operate on files or directories in any Hadoop filesystem,
and they are very similar to the hadoop fs commands (which is not surprising, as both
are simple wrappers around the Hadoop FileSystem interface). You can access all of
the Hadoop filesystem shell commands using Pig's fs command. For example, fs -ls
will show a file listing, and fs -help will show help on all the available commands.