rails server
以前実行していた Rails アプリケーションの起動中に、次のエラーが発生します。
/home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.5/lib/action_dispatch.rb:35:in `require': cannot load such file -- rack (LoadEr
ror)
from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.5/lib/action_dispatch.rb:35:in `<top (required)>'
from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands/server.rb:3:in `require'
from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands/server.rb:3:in `<top (required)>'
from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands.rb:49:in `require'
from /home/ganesh/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.5/lib/rails/commands.rb:49:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
このエラーを削除する方法。助けて。