Steps to install Pig in Ubuntu

1. Download tar file from this link :
( Do check that pig version support installed Hadoop version)
e.g. My ubuntu  has Hadoop 1.2.1 installed and  have installed pig 0.12.1
Hadoop installed under : /usr/local/hadoop
hduser  (hadoop group user) is under : /home/hduser

2. Open terminal and logged in as hduser
                su hduser

3. Unpack the downloaded tar file using command
                tar xzf  pig-0.12.1.tar.gz
    This will install pig under /home/hduser/

4. Edit bash file 
               gedit ~/.bashrc

Append following line   
export PIG_HOME=/home/hduser/pig-0.12.1 
export PATH=$PATH:$PIG_HOME/bin
export PIG_CLASSPATH=/usr/local/hadoop/conf

5.  In terminal type
               pig 
This will open grunt (interactive shell for running pig commands)  in Mapreduce mode.
(*Before starting pig make sure you have started Hadoop
 /usr/local/hadoop$  bin/start-all.sh    )



 Learning goes on forever :)