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cd ~
curl -sS https://getcomposer.org/installer | php54 -- --install-dir=$HOME/bin
wget https://github.com/drush-ops/drush/archive/6.4.0.zip
unzip 6.4.0.zip
ln -s ~/drush-6.4.0/drush ~/bin/
echo "export DRUSH_PHP=php54" >> ~/.bash_profile
source ~/.bash_profile
hash -r