Ruby関係

sudo apt-get install apache2
sudo apt-get install ruby1.8-elisp
sudo apt-get install libapache2-mod-ruby
sudo apt-get install gcc g++ make
sudo apt-get install ruby1.8 ruby1.8-dev rubygems
sudo apt-get install libopenssl-ruby
sudo gem install rails
sudo gem install activesupport
sudo apt-get install sqlite3
sudo apt-get install libsqlite3-ruby libsqlite-ruby
sudo gem install activerecord
sudo gem sources -a http://gems.github.com
sudo gem install twitter --include-dependencies
sudo gem install echoe
sudo gem install simple-rss
sudo gem install feed-normalizer
sudo apt-get install libxml2-dev 
sudo apt-get install libxslt1-dev
sudo gem install nokogiri
sudo gem install mechanize
sudo gem install mongrel
sudo gem install mongrel_cluster
sudo gem install pit
sudo apt-get install libgemplugin-ruby

githubをgem sourcesに加えないと、jnunemaker-crackが見つからないと言われてしまう