rails server not starting on rails 3.1.2

Question

I am using rails 3.2.1 with ruby 1.9.3 on ubuntu 13.10 with rbenv I hace everything good but when I try to start the server it gives an error anybody who know anything related to this please help. In a great need.

=> Booting WEBrick
=> Rails 4.2.0 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server

Exiting
/home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require': cannot load such file -- uuid (LoadError)
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `block in require'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
    from /home/ahmed/Insoshi-Rails-3/config/initializers/custom_requires.rb:17:in `<top (required)>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `block in load'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:652:in `block in load_config_initializer'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/notifications.rb:166:in `instrument'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:651:in `load_config_initializer'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:615:in `each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:615:in `block in <class:Engine>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `instance_exec'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `run'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:150:in `block in tsort_each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:219:in `each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:209:in `block in each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:44:in `each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:44:in `tsort_each_child'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:203:in `each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:182:in `block in each_strongly_connected_component'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:180:in `each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:180:in `each_strongly_connected_component'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:148:in `tsort_each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:54:in `run_initializers'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/application.rb:352:in `initialize!'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/railtie.rb:194:in `public_send'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/railtie.rb:194:in `method_missing'
    from /home/ahmed/Insoshi-Rails-3/config/environment.rb:5:in `<top (required)>'
    from /home/ahmed/Insoshi-Rails-3/config.ru:3:in `require'
    from /home/ahmed/Insoshi-Rails-3/config.ru:3:in `block in <main>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:55:in `instance_eval'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:55:in `initialize'
    from /home/ahmed/Insoshi-Rails-3/config.ru:in `new'
    from /home/ahmed/Insoshi-Rails-3/config.ru:in `<main>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:49:in `eval'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:49:in `new_from_string'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:40:in `parse_file'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/server.rb:299:in `build_app_and_options_from_config'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/server.rb:208:in `app'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/server.rb:61:in `app'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/server.rb:336:in `wrapped_app'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/server.rb:139:in `log_to_stdout'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/server.rb:78:in `start'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:80:in `block in server'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>

Answer 1

It is possible that all dependencies are not installed. If you have not used rvm to install ruby, you should try using it to install your ruby version.

rvm install 1.9.3

or

rvm reinstall 1.9.3

refer https://rvm.io/rvm/install for step by step instructions.