rails 3,为什么我不能在ubuntu上使用命令行？

Question

我在Ubuntu 11.10上运行RubyMine 4,RubyMine中的每一件事情都很好,我可以运行服务器,开发等等.但是,当我需要在命令行上工作时,我什么都做不了..

我cd到我的app目录,然后我试着:

$ rails s

我明白了:

The program 'rails' is currently not installed.  You can install it by typing:
sudo apt-get install rails

这很奇怪,为什么我没有安装它,而我可以在RubyMine IDE中正常工作!

我需要使用命令行卸载gem,发现我不能使用命令行,因为它应该...

sam@ubuntu:~/Documents/RoR/course_builder$ gem uninstall 'capybara-firebug'
ERROR:  While executing gem ... (Gem::InstallError)
    cannot uninstall, check `gem list -d capybara-firebug`

$ gem list -d 会给我:

*** LOCAL GEMS ***

那里没有宝石..

如果我输入:

$ bundle install

我明白了:

/usr/lib/ruby/vendor_ruby/bundler/rubygems_ext.rb:8:in `require': no such file to load -- rubygems (LoadError)
    from /usr/lib/ruby/vendor_ruby/bundler/rubygems_ext.rb:8
    from /usr/lib/ruby/vendor_ruby/bundler.rb:11:in `require'
    from /usr/lib/ruby/vendor_ruby/bundler.rb:11
    from /usr/bin/bundle:4:in `require'
    from /usr/bin/bundle:4

尽管bundle installRubyMine内部工作正常

那么,我在这里失踪了什么？!! 为什么我不能使用命令行..？

这是我的宝石环境:

RUBYGEMS VERSION: 1.8.10
RUBY VERSION: 1.9.3 (2011-10-30 patchlevel 0) [i686-linux]
INSTALLATION DIRECTORY: /home/sam/.rvm/gems/ruby-1.9.3-p0@global
RUBY EXECUTABLE: /home/sam/.rvm/rubies/ruby-1.9.3-p0/bin/ruby
EXECUTABLE DIRECTORY: /home/sam/.rvm/gems/ruby-1.9.3-p0@global/bin
RUBYGEMS PLATFORMS:
  ruby
  x86-linux
GEM PATHS:
   /home/sam/.rvm/gems/ruby-1.9.3-p0@global
GEM CONFIGURATION:
   :update_sources => true
   :verbose => true
   :benchmark => false
   :backtrace => false
   :bulk_threshold => 1000
REMOTE SOURCES:
   http://rubygems.org/
----------------------
IDE: JetBrains RubyMine 4.0.1, build #RM-113.20
OS: Linux 3.0.0-16-generic[i386]
Java: 1.6.0_23-b23
RubyMine SDK Environment:
Sdk: RVM: ruby-1.9.3-p0 [global]
Sdk Version: ver.1.9.3p0 ( revision 33570) p0
Ruby Interpreter: /home/sam/.rvm/rubies/ruby-1.9.3-p0/bin/ruby
RVM Sdk: yes, gemset:global
RVM Home: /home/sam/.rvm
Sdk Language Level: 1.9
Sdk Load Path:
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby/1.9.1/i686-linux
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/site_ruby
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/vendor_ruby/1.9.1
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/vendor_ruby/1.9.1/i686-linux
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/vendor_ruby
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1
     ~/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/i686-linux
     /opt/RubyMine-4.0.1/rubystubs19
Sdk Gem paths: 
     ~/.rvm/gems/ruby-1.9.3-p0@global/bundler/gems
     ~/.rvm/gems/ruby-1.9.3-p0@global/gems
Gems used for 'hope':
     xpath (bundled(0.1.4))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/xpath-0.1.4
     rack (1.3.6)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rack-1.3.6
     rspec-expectations (2.7.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rspec-expectations-2.7.0
     rack-mount (bundled(0.8.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rack-mount-0.8.3
     rubyzip (bundled(0.9.5))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rubyzip-0.9.5
     bcrypt-ruby (bundled(3.0.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/bcrypt-ruby-3.0.1
     activemodel (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/activemodel-3.1.0
     client_side_validations (3.1.4)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/client_side_validations-3.1.4
     cocoon (bundled(1.0.15))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/cocoon-1.0.15
     diff-lcs (1.1.3)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/diff-lcs-1.1.3
     sprockets (2.0.3)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/sprockets-2.0.3
     rack-ssl (1.3.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rack-ssl-1.3.2
     simple_form (1.5.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/simple_form-1.5.2
     thor (bundled(0.14.6))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/thor-0.14.6
     rdoc (3.12)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rdoc-3.12
     rubyzip (bundled(0.9.6.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rubyzip-0.9.6.1
     foreigner (1.1.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/foreigner-1.1.1
     mocha (bundled(0.10.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/mocha-0.10.3
     mime-types (bundled(1.17.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/mime-types-1.17.2
     treetop (bundled(1.4.10))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/treetop-1.4.10
     therubyracer (bundled(0.9.9))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/therubyracer-0.9.9
     kaminari (bundled(0.13.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/kaminari-0.13.0
     selenium-webdriver (bundled(2.17.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/selenium-webdriver-2.17.0
     coffee-script (2.2.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/coffee-script-2.2.0
     sass (bundled(3.1.14))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/sass-3.1.14
     mail (bundled(2.3.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/mail-2.3.0
     rack-mount (0.8.3)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rack-mount-0.8.3
     will_paginate (bundled(3.0.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/will_paginate-3.0.3
     i18n (0.6.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/i18n-0.6.0
     rspec-mocks (bundled(2.7.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rspec-mocks-2.7.0
     ansi (bundled(1.4.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/ansi-1.4.1
     orm_adapter (0.0.6)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/orm_adapter-0.0.6
     rspec-core (2.7.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rspec-core-2.7.1
     pg (0.13.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/pg-0.13.2
     metaclass (0.0.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/metaclass-0.0.1
     builder (3.0.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/builder-3.0.0
     execjs (bundled(1.3.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/execjs-1.3.0
     uglifier (bundled(1.2.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/uglifier-1.2.3
     jquery-rails (bundled(1.0.19))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/jquery-rails-1.0.19
     rspec-expectations (bundled(2.7.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rspec-expectations-2.7.0
     bundler (1.0.21)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21
     postgres-pr (bundled(0.6.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/postgres-pr-0.6.3
     capybara-firebug (bundled(1.0.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/capybara-firebug-1.0.1
     rspec-rails (bundled(2.7.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rspec-rails-2.7.0
     warden (1.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/warden-1.1.0
     rails (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rails-3.1.0
     sass-rails (3.1.5)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/sass-rails-3.1.5
     capybara-firebug (1.0.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/capybara-firebug-1.0.1
     rspec (2.7.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rspec-2.7.0
     actionpack (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/actionpack-3.1.0
     rack (bundled(1.3.6))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rack-1.3.6
     mime-types (1.17.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/mime-types-1.17.2
     capybara (bundled(1.1.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/capybara-1.1.2
     nokogiri (1.5.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/nokogiri-1.5.0
     rake (0.9.2.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rake-0.9.2.2
     nokogiri (bundled(1.5.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/nokogiri-1.5.0
     sqlite3 (1.3.5)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/sqlite3-1.3.5
     actionmailer (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/actionmailer-3.1.0
     therubyracer (0.9.9)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/therubyracer-0.9.9
     metaclass (bundled(0.0.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/metaclass-0.0.1
     launchy (2.0.5)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/launchy-2.0.5
     rack-cache (bundled(1.0.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rack-cache-1.0.3
     rdoc (bundled(3.12))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rdoc-3.12
     polyglot (0.3.3)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/polyglot-0.3.3
     factory_girl (bundled(2.4.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/factory_girl-2.4.0
     tilt (bundled(1.3.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/tilt-1.3.3
     uglifier (1.2.3)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/uglifier-1.2.3
     rb-fsevent (bundled(0.4.3.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rb-fsevent-0.4.3.1
     uglifier (bundled(1.2.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/uglifier-1.2.2
     treetop (1.4.10)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/treetop-1.4.10
     warden (bundled(1.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/warden-1.1.0
     coffee-script-source (1.2.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/coffee-script-source-1.2.0
     execjs (bundled(1.2.13))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/execjs-1.2.13
     guard-spork (bundled(0.5.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/guard-spork-0.5.1
     ffi (1.0.11)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/ffi-1.0.11
     rb-fsevent (bundled(0.9.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rb-fsevent-0.9.0
     ffi (bundled(1.0.11))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/ffi-1.0.11
     arel (bundled(2.2.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/arel-2.2.1
     guard (bundled(1.0.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/guard-1.0.0
     kaminari (0.13.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/kaminari-0.13.0
     validate_url (bundled(0.2.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/validate_url-0.2.0
     coffee-rails (3.1.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/coffee-rails-3.1.1
     actionmailer (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/actionmailer-3.1.0
     turn (bundled(0.9.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/turn-0.9.2
     capybara-webkit (bundled(0.9.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/capybara-webkit-0.9.0
     coffee-rails (bundled(3.1.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/coffee-rails-3.1.1
     rspec-mocks (2.7.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rspec-mocks-2.7.0
     childprocess (bundled(0.3.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/childprocess-0.3.1
     sprockets (bundled(2.0.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/sprockets-2.0.3
     execjs (1.3.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/execjs-1.3.0
     tilt (1.3.3)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/tilt-1.3.3
     rspec (bundled(2.7.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rspec-2.7.0
     spork (bundled(0.9.0.rc9))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/spork-0.9.0.rc9
     rspec-rails (2.7.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rspec-rails-2.7.0
     haml (bundled(3.1.4))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/haml-3.1.4
     rake (bundled(0.9.2.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rake-0.9.2.2
     tzinfo (0.3.31)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/tzinfo-0.3.31
     bcrypt-ruby (3.0.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/bcrypt-ruby-3.0.1
     pg (bundled(0.13.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/pg-0.13.2
     actionpack (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/actionpack-3.1.0
     devise (bundled(1.5.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/devise-1.5.2
     capybara-webkit (bundled(0.8.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/capybara-webkit-0.8.0
     database_cleaner (0.7.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/database_cleaner-0.7.1
     foreigner (bundled(1.1.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/foreigner-1.1.1
     addressable (bundled(2.2.6))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/addressable-2.2.6
     selenium-webdriver (bundled(2.19.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/selenium-webdriver-2.19.0
     rspec-core (bundled(2.7.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rspec-core-2.7.1
     simple_form (bundled(1.5.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/simple_form-1.5.2
     builder (bundled(3.0.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/builder-3.0.0
     erubis (bundled(2.7.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/erubis-2.7.0
     orm_adapter (bundled(0.0.6))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/orm_adapter-0.0.6
     validate_url (0.2.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/validate_url-0.2.0
     cocoon (1.0.15)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/cocoon-1.0.15
     addressable (2.2.6)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/addressable-2.2.6
     haml (3.1.4)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/haml-3.1.4
     sass (bundled(3.1.12))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/sass-3.1.12
     hike (1.2.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/hike-1.2.1
     libv8 (bundled(3.3.10.4))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/libv8-3.3.10.4-x86-linux
     coffee-script-source (bundled(1.2.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/coffee-script-source-1.2.0
     erubis (2.7.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/erubis-2.7.0
     spork (bundled(1.0.0rc2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/spork-1.0.0rc2
     factory_girl_rails (bundled(1.5.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/factory_girl_rails-1.5.0
     capybara (1.1.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/capybara-1.1.2
     tzinfo (bundled(0.3.31))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/tzinfo-0.3.31
     mocha (bundled(0.10.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/mocha-0.10.1
     jquery-rails (1.0.19)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/jquery-rails-1.0.19
     json (1.6.5)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/json-1.6.5
     guard (bundled(0.10.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/guard-0.10.0
     factory_girl (bundled(2.5.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/factory_girl-2.5.1
     factory_girl_rails (bundled(1.6.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/factory_girl_rails-1.6.0
     hike (bundled(1.2.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/hike-1.2.1
     rack-cache (1.0.3)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rack-cache-1.0.3
     activeresource (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/activeresource-3.1.0
     railties (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/railties-3.1.0
     libv8 (3.3.10.4)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/libv8-3.3.10.4-x86-linux
     rack-test (bundled(0.6.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rack-test-0.6.1
     sass-rails (bundled(3.1.5))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/sass-rails-3.1.5
     i18n (bundled(0.6.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/i18n-0.6.0
     multi_json (1.0.4)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/multi_json-1.0.4
     sqlite3 (bundled(1.3.5))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/sqlite3-1.3.5
     xpath (0.1.4)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/xpath-0.1.4
     coffee-script (bundled(2.2.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/coffee-script-2.2.0
     activemodel (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/activemodel-3.1.0
     turn (bundled(0.8.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/turn-0.8.3
     activesupport (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/activesupport-3.1.0
     will_paginate (bundled(3.0.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/will_paginate-3.0.2
     devise (1.5.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/devise-1.5.2
     ansi (bundled(1.4.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/ansi-1.4.2
     polyglot (bundled(0.3.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/polyglot-0.3.3
     json (bundled(1.6.5))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/json-1.6.5
     mail (2.3.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/mail-2.3.0
     client_side_validations (bundled(3.1.4))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/client_side_validations-3.1.4
     activerecord (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/activerecord-3.1.0
     rack-ssl (bundled(1.3.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rack-ssl-1.3.2
     guard-spork (bundled(0.5.2))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/guard-spork-0.5.2
     childprocess (bundled(0.3.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/childprocess-0.3.0
     rack-test (0.6.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/rack-test-0.6.1
     activerecord (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/activerecord-3.1.0
     arel (2.2.1)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/arel-2.2.1
     activesupport (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/activesupport-3.1.0
     rails (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/rails-3.1.0
     activeresource (bundled(3.1.0))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/activeresource-3.1.0
     launchy (bundled(2.0.5))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/launchy-2.0.5
     railties (3.1.0)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/railties-3.1.0
     ansi (1.4.2)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/ansi-1.4.2
     multi_json (bundled(1.0.4))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/multi_json-1.0.4
     thor (0.14.6)
         ~/.rvm/gems/ruby-1.9.3-p0@global/gems/thor-0.14.6
     database_cleaner (bundled(0.7.1))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/database_cleaner-0.7.1
     diff-lcs (bundled(1.1.3))
         ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/diff-lcs-1.1.3

编辑

如果我键入rvm,我会得到:

    = rvm

    * http://github.com/wayneeseguin/rvm

    == DESCRIPTION:

    RVM is the Ruby enVironment Manager (rvm).
    It manages Ruby application environments and switching between them.

    == Usage

      rvm [Flags] [Options] Action [Implementation[,Implementation[,...]]

    == Flags

      --default     - with 'rvm use X', sets the default ruby for new shells to X.
      --debug       - Toggle debug mode on for very verbose output.
      --trace       - Toggle trace mode on to see EVERYTHING rvm is doing.
      --force       - Force install, removes old install & source before install.

....

    == Contributions:

      Any and all contributions offered in any form, past present or future, to the
      RVM project are understood to be in complete agreement and acceptance with the
      Apache Licence v2.0.

    == INSTALL:

    See http://rvm.beginrescueend.com/rvm/install/

    or just use:

        bash < <(curl -s https://rvm.beginrescueend.com/install/rvm)

    == LICENSE:

    Copyright (c) 2009-2011 Wayne E. Seguin

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

如果我输入ruby -v

sam@ubuntu:~/Documents/RoR/course_builder$ ruby -v
ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-linux]

Answer 1

我不相信你的rvm设置正确.为简单起见,让我们从开头按照这里的说明开始:

http://beginrescueend.com/rvm/install/

在命令行中安装.

user$ bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer )

在主目录中打开.bashrc文件夹.

user$ vim .bashrc

编辑并添加:

[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function

获取.bashrc文件并关闭终端

user$ source ~/.bashrc
user$ exit

重新打开终端并检查rvm是否正常工作.

user$ type rvm | head -1

如果它返回

rvm is a function

我们很好.检查您是否具备所有先决条件:

rvm requirements

根据需要安装.选择你最喜欢的红宝石味道(好像它是1.8.7,如果是这样,请按照确切的命令或用你的选择替换它).

rvm install 1.8.7

完成后,

rvm use 1.8.7 --default

如果这不起作用,请通过运行更新帖子

which ruby