sqlite3入れる
sudo apt-get install libdbd-sqlite3-ruby libsqlite3-ruby libsqlite3-dev sqlite3 ruby1.8-dev sudo gem install activerecord sqlite3-ruby
sudo apt-get install libdbd-sqlite3-ruby libsqlite3-ruby libsqlite3-dev sqlite3 ruby1.8-dev sudo gem install activerecord sqlite3-ruby