我将我的 Ubuntu 10.04 LTS 实例（通过 Windows 7 上的 Virtual Box）与非 root 用户一起使用。我正在尝试开发 Rails 应用程序，我注意到我需要使用 sudo 运行一些 rails 命令。这给我的问题是一些文件是由 root 用户创建的，我无法使用我的登录用户通过 GNOME 窗口编辑它们。
在这里做什么是正确的？我应该以某种方式始终以 root 身份登录吗？如果有怎么办？有什么方法可以让我的主目录下的所有文件（我在其中完成所有 Rails 工作）为所有用户提供正确的权限，这样我就可以通过一个窗口使用我的登录用户编辑它们？
目前我不得不求助于通过命令行打开一个文件，比如sudo gedit myFile.rb - 这不是很可持续！
提前致谢！
我正在尝试在Ubuntu 10.04 LTS 上安装refinerycms，这是一个Ruby on Rails CMS。我跑rails server了，我得到以下异常：
carcher@carcher-laptop:~/Code/tgc$ rails server
=> Booting WEBrick
=> Rails 3.0.0 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/usr/lib/ruby/gems/1.8/gems/rmagick-2.12.2/lib/RMagick2.so: This installation of RMagick was configured with ImageMagick 6.6.4 but ImageMagick 6.5.7-8 is in use. (RuntimeError)
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `load_dependency'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:591:in `new_constants_in'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `load_dependency'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/rmagick-2.12.2/lib/RMagick.rb:11
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `load_dependency'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:591:in `new_constants_in'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `load_dependency'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/dragonfly-0.7.6/lib/dragonfly/analysis/r_magick_analyser.rb:1
from /usr/lib/ruby/gems/1.8/gems/dragonfly-0.7.6/lib/dragonfly/config/r_magick.rb:15:in `apply_configuration'
from /usr/lib/ruby/gems/1.8/gems/dragonfly-0.7.6/lib/dragonfly/configurable.rb:33:in `configure'
from /usr/lib/ruby/gems/1.8/gems/dragonfly-0.7.6/lib/dragonfly/config/r_magick.rb:14:in `apply_configuration'
from /usr/lib/ruby/gems/1.8/gems/dragonfly-0.7.6/lib/dragonfly/configurable.rb:39:in `configure_with'
from /usr/lib/ruby/gems/1.8/gems/refinerycms-0.9.8.2/vendor/refinerycms/images/lib/images.rb:10
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `instance_exec'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/initializable.rb:25:in `run'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/initializable.rb:50:in `run_initializers'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `each'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/initializable.rb:49:in `run_initializers'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/application.rb:134:in `initialize!'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/application.rb:77:in `send'
from /usr/lib/ruby/gems/1.8/gems/railties-3.0.0/lib/rails/application.rb:77:in `method_missing'
from /home/carcher/Code/tgc/config/environment.rb:5
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `load_dependency'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:591:in `new_constants_in'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:225:in `load_dependency'
from /usr/lib/ruby/gems/1.8/gems/activesupport-3.0.0/lib/active_support/dependencies.rb:239:in `require'
from /home/carcher/Code/tgc/config.ru:3
from /usr/lib/ruby/gems/1.8/gems/rack-1.2.1/lib/rack/builder.rb:46:in `instance_eval'
from /usr/lib/ruby/gems/1.8/gems/rack-1.2.1/lib/rack/builder.rb:46:in `initialize'
from /home/carcher/Code/tgc/config.ru:1:in `new'
from /home/carcher/Code/tgc/config.ru:1
carcher@carcher-laptop:~/Code/tgc$
我按照此处的说明从源代码构建并安装了 ImageMagick 6.6.4，在此之前我删除了 Ubuntu 中预安装的 ImageMagick 工具，以避免任何冲突。但我似乎仍然有这个版本 6.5.7。
我想我的问题是如何删除/禁用ImageMagick 6.5.7-8？