Ubuntu 14.04 にrbenvを使用し、ruby2.1.2をインストールする
install packages sudo add-apt-repository ppa:chris-lea/node.js sudo apt-get update sudo apt-get install build-essential git curl zlib1g-dev libssl-dev libreadline-dev libyaml-dev libxml2-dev libxslt-dev sqlite3 libsqlite3-dev nodejs tk ruby-dev rbenv install git clone https://github.com/sstephenson/rbenv.git ~/.rbenv git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc echo 'eval "$(rbenv init -)"' >> ~/.bashrc . .bashrc gem install rbenv-rehash gem install bundler ruby install rbenv install -list rbenv install 2.1.2 rbenv versions rbenv global 2.1.2 rails gem install rails rbenv rehash rails -v