嗨，我一直在尝试安装 Ruby gem 包。收到此消息后，我按照说明gem install bundle进行操作，但是当我键入时它仍然不起作用bundle -v。我也打字
which bundle并收到
/Users/edmundmai/.rvm/bin/bundle
所以它存在！那为什么不行！！我没有得到的神秘 $PATH 有什么问题吗？（我是菜鸟）。
这是我的 .bash_profile：
PATH=$PATH:~/bin
export PATH
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function
这是我的 .bashrc ：
PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
这是我的宝石环境：
RubyGems Environment:
- RUBYGEMS VERSION: 1.8.24
- RUBY VERSION: 1.9.3 (2012-04-20 patchlevel 194) [x86_64-darwin11.3.1]
- INSTALLATION DIRECTORY: /Users/edmundmai/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd
- RUBY EXECUTABLE: /Users/edmundmai/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
- EXECUTABLE DIRECTORY: /Users/edmundmai/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/bin
- RUBYGEMS PLATFORMS:
- ruby
- x86_64-darwin-11
- GEM PATHS:
- /Users/edmundmai/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd
- /Users/edmundmai/.rvm/gems/ruby-1.9.3-p194@global
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :benchmark => false
- :backtrace => false
- :bulk_threshold => 1000
- "install" => "--no-rdoc --no-ri"
- "update" => "--no-rdoc --no-ri"
- REMOTE SOURCES:
- http://rubygems.org/
回声 $PATH
/Users/edmundmai/.rvm/bin:/Users/edmundmai/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/bin:/Users/edmundmai/.rvm/gems/ruby-1.9.3-p194@global/bin:/Users/edmundmai/.rvm/rubies/ruby-1.9.3-p194/bin:/Users/edmundmai/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/Users/edmundmai/bin:/Users/edmundmai/bin
更新因此，在再次尝试阅读 RoR 教程之后，我在我的两个终端窗口之一中重复了本章前面的一些步骤（我们称它们为终端 #1 和终端 #2）。终端 #2 仍然不起作用（命令行不在任何目录上，只是默认目录），而终端 #1（在我的 sample_app 目录中）工作。我想rvm get head && rvm reload可能是关键？但这是否意味着我每次打开终端时都必须运行它？查看我的终端 #1 之前和之后的命令（我删除了一些输出，以便更清楚我的输入行是什么）：
Edmunds-MacBook-Pro:sample_app edmundmai$ bundle -v
ERROR: Gem bundler is not installed, run `gem install bundler` first.
Edmunds-MacBook-Pro:sample_app edmundmai$ gem install
ERROR: While executing gem ... (Gem::CommandLineError)
Please specify at least one gem name (e.g. gem build GEMNAME)
Edmunds-MacBook-Pro:sample_app edmundmai$ rvm -v
rvm 1.15.8 (master) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]
Edmunds-MacBook-Pro:sample_app edmundmai$ rspec spec/
No DRb server is running. Running in local process instead ...
........
Finished in 0.36709 seconds
8 examples, 0 failures
Randomized with seed 59500
Edmunds-MacBook-Pro:sample_app edmundmai$ subl .
Edmunds-MacBook-Pro:sample_app edmundmai$ bundle install --binstubs=./bundler_stubs
Using rake (0.9.2.2)
...
...
(**list of stuff)
Using uglifier (1.2.3)
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
Edmunds-MacBook-Pro:sample_app edmundmai$ bundle show bundler
/Users/edmundmai/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/bundler-1.2.0
我非常不清楚 $PATH 的作用。如果你们需要更多信息，请随时告诉我，我会提供。