installation de ruby 1.9.1

 sudo apt-get install  ruby1.9.1 irb1.9.1  rdoc1.9.1 rubygems1.9.1 libxml-ruby1.9.1
 sudo apt-get install  libxml2 libxslt1.1 libxml2-dev libxslt1-dev

 sudo gem install racc
 sudo gem install hirb
 sudo gem install ruby-xslt
 sudo gem install rake