Ubuntu 安裝Ruby on Rails 3

sudo apt-get libzlib-ruby 解決zlib錯誤

原始檔ruby-1.8.7-p174.tar編譯
~/ruby-1.8.7-p174/: ./configrure
~/ruby-1.8.7-p174/: make
~/ruby-1.8.7-p174/: sudo make install
ruby setup.rb 安裝gem
sudo gem install json
sudo gem install rails

sudo apt-get install libsqlite3-dev
專案目錄/:  bundle install

execjs 錯誤解法:
安裝'g++'
gem install therubyracer -v '0.9.8'
vim ~/專案目錄/gemfile:
gem 'execjs'
gem 'therubyracer'
bundle install

缺少openssl 解法:
安裝'openssl'和'libssl-dev'
在~/ruby-1.8.7-p174/ext/openssl/:
ruby extconf.rb
make
sudo make install