Rails開発者は初めてで、サーバーにRailsアプリケーションをデプロイしています。しかし、現在は開始されておらず、以下のようにブラウザでエラーが発生しています:
エラーメッセージ:
There was an error while trying to write to Gemfile.lock. It is likely that you need to allow write permissions for the file at path: /var/www/PCMI/zil/Gemfile.lock (Bundler::InstallError)
例外クラス:
PhusionPassenger::UnknownError
アプリケーション ルート:
/var/www/PCMI/zil 
バックトレース:
0  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/bundler-1.2.0/lib/       bundler/definition.rb  238  in `rescue in lock'
1  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/bundler-1.2.0/lib/bundler/definition.rb 223     in `lock'
2   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/bundler-1.2.0/lib/bundler/environment.rb   39  in `lock'
3   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/bundler-1.2.0/lib/bundler/runtime.rb   39  in `setup'
4   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/bundler-1.2.0/lib/bundler.rb   116     in `setup'
5   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/utils.rb    326     in `prepare_app_process'
6   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/rack/application_spawner.rb     156     in `block in initialize_server'
7   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/utils.rb    563     in `report_app_init_status'
8   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/rack/application_spawner.rb     154     in `initialize_server'
9   /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/abstract_server.rb  204     in `start_synchronously'
10  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/abstract_server.rb  180     in `start'
11  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/rack/application_spawner.rb     129     in `start'
12  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/spawn_manager.rb    253     in `block (2 levels) in spawn_rack_application'
13  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/abstract_server_collection.rb   132     in `lookup_or_add'
14  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/spawn_manager.rb    246     in `block in spawn_rack_application'
15  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/abstract_server_collection.rb   82  in `block in synchronize'
16  < td=""> <> prelude>    10:in `synchronize'
17  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/abstract_server_collection.rb   79  in `synchronize'
18  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/spawn_manager.rb    244     in `spawn_rack_application'
19  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/spawn_manager.rb    137     in `spawn_application'
20  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/spawn_manager.rb    275     in `handle_spawn_application'
21  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/abstract_server.rb  357     in `server_main_loop'
22  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/lib/phusion_passenger/abstract_server.rb  206     in `start_synchronously'
23  /usr/local/rvm/gems/ruby-1.9.3-p125@domain_name/gems/passenger-3.0.17/helper-scripts/passenger-spawn-server     99  in `'
ブラウザに表示されるエラーを確認してください。私の問題を解決してください。ありがとう。