多个pig时，设置本用户的pig运行版本

cat ~/.bash_profile

# .bash_profile

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# Get the aliases and functions

if [ -f ~/.bashrc ]; then

. ~/.bashrc

fi

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# User specific environment and startup programs

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PATH=/usr/bin/pig-0.9.2/bin:$PATH:$HOME/bin

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export PATH

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把首先要用的写在前面

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