http://www.percona.com/docs/wiki/repositories:apt
sudo apt-get install percona-server-client-5.5
sudo apt-get install libmysqlclient-dev
sudo apt-get install percona-server-server-5.5
http://www.rubyenterpriseedition.com/download.html
ln -nfs /opt/ruby-enter..... /opt/ruby
gem install rdoc-data; rdoc-data --install
sudo aptitude install libcurl4-openssl-dev apache2-mpm-prefork apache2-prefork-dev libapr1-dev libaprutil1-dev
sudo /opt/ruby/bin/passenger-install-apache2-module
http://www.kleinfelter.com/node/188
Insert into /etc/gemrc
install: --no-rdoc --no-ri
update: --no-rdoc --no-ri
Note: You likely do not want to run this for every gem command, as these args would break some 'gem X' commands. Which is why I did not use 'gem: --no-rdoc --no-ri' in the example above.