我正在尝试在新安装的Rails上创建一个新的应用程序，它给了我一个'权限被拒绝'，然后很多其他的东西，然后才开始工作。
我试图寻找答案，但似乎根本找不到容易找到的答案。这就是我的终端的样子：
Zach-Beckers-Computer:rails_projects Zach$ rails new first_app
create
/Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/fileutils.rb:247:in `mkdir': Permission denied - /rails_projects/first_app (Errno::EACCES)
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/fileutils.rb:247:in `fu_mkdir'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/fileutils.rb:221:in `block (2 levels) in mkdir_p'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/fileutils.rb:219:in `reverse_each'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/fileutils.rb:219:in `block in mkdir_p'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/fileutils.rb:205:in `each'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/fileutils.rb:205:in `mkdir_p'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/actions/empty_directory.rb:51:in `block in invoke!'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/actions/empty_directory.rb:114:in `call'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/actions/empty_directory.rb:114:in `invoke_with_conflict_check'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/actions/empty_directory.rb:50:in `invoke!'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/actions.rb:95:in `action'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/actions/empty_directory.rb:15:in `empty_directory'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/railties-3.2.2/lib/rails/generators/app_base.rb:103:in `create_root'
from (eval):1:in `create_root'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/task.rb:22:in `run'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/invocation.rb:118:in `invoke_task'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `block in invoke_all'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `each'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `map'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/invocation.rb:124:in `invoke_all'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/group.rb:226:in `dispatch'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/thor-0.14.6/lib/thor/base.rb:389:in `start'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/railties-3.2.2/lib/rails/commands/application.rb:38:in `<top (required)>'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/railties-3.2.2/lib/rails/cli.rb:15:in `<top (required)>'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /Users/Zach/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/gems/railties-3.2.2/bin/rails:7:in `<top (required)>'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/bin/rails:19:in `load'
from /Users/Zach/.rvm/gems/ruby-1.9.3-p125@rails3tutorial2ndEd/bin/rails:19:in `<main>'
我不知道我需要什么或我需要做什么。我应该提一下，我在一台1岁的Macbook pro上运行OSX Lion（10.7）。
答案 0 :(得分：10)
当您应该在“home”目录中时，您似乎正尝试在根目录中创建rails应用程序。在OS X中，它是/ Users / Zach。这样做：
cd ~/
mkdir rails_projects
cd rails_projects
rails new first_app
答案 1 :(得分：1)
您对尝试创建Rails应用程序的目录没有写入权限。确保该目录属于具有chown的用户，并确保您使用chmod对该目录具有写入权限。