我已经尝试过了，但是它没有用，似乎适用于osx。我用rvm，rails 3和ruby 1.9.2重新安装了Ubuntu
10.10。我有一个新鲜的Rails应用程序，但是使用gem或rails会导致以下警告（带有滞后）。

$ rails -v

/home/chance/.rvm/gems/ruby-1.9.2-p180@global/gems/railties-3.0.5/lib/rails/script_rails_loader.rb:11: warning: Insecure world writable dir /home/chance in PATH, mode 040777
/home/chance/.rvm/gems/ruby-1.9.2-p180@global/gems/bundler-1.0.10/lib/bundler/runtime.rb:136: warning: Insecure world writable dir /home/chance in PATH, mode 040777
Rails 3.0.5

$ gem -v

/home/chance/.rvm/rubies/ruby-1.9.2-p180/bin/gem:4: warning: Insecure world writable dir /home/chance in PATH, mode 040777
1.6.2

以防万一，这是我的Gemfile：

source 'http://rubygems.org'

gem 'rails'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'sqlite3'
gem 'sqlite3-ruby', :require => 'sqlite3'
gem "haml"
gem "formtastic"
gem "will_paginate"
gem "devise"
gem "delayed_job"
gem "whenever"
gem "memcache-client"
gem "capistrano"
group :testing do
  gem "rspec"
  gem "rspec-rails"
  gem "autotest-standalone"
  gem "autotest-rails"
  gem "autotest-growl"
  gem "mocha"
  gem "shoulda"
  gem "factory_girl_rails"
end

group :development do
  gem "cheat"
  gem "bullet"
  gem "ruby-growl"

end