http://ygamretuta.me/2011/05/09/install-rvm-in-ubuntu-11-10-oneiric-ocelot-and-mac-osx/ https://rvm.io/rvm/install/sudo apt-get install build-essential bison openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev …

ln -s /usr/bin/ruby1.9.1 /usr/bin/ruby ln -s /usr/bin/gem1.9.1 /usr/bin/gem