rails 3，为什么我不能在ubuntu上使用命令行？

问题描述：

我在Ubuntu 11.10上运行RubyMine 4，RubyMine内部的每件事情都很好，我可以运行服务器，开发等。但是，当我需要在命令行上工作时，我无法做任何事情。rails 3，为什么我不能在ubuntu上使用命令行？

我cd到我的应用程序目录，然后我想：

$ rails s

我得到：

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

这是奇怪的是，为什么它没有安装，而我可以在RubyMine的正常工作IDE！

我需要使用命令行卸载宝石，发现我不能使用命令行，因为它应该..

[email protected]:~/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 ***

没有宝石有..

如果I型：

$ bundle install

我得到：

/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

虽然bundle install内的RubyMine工作正常

所以，我很想念这里！？为什么我不能使用命令行..？

这里是我的宝石环境：

RUBYGEMS VERSION: 1.8.10 
RUBY VERSION: 1.9.3 (2011-10-30 patchlevel 0) [i686-linux] 
INSTALLATION DIRECTORY: /home/sam/.rvm/gems/[email protected] 
RUBY EXECUTABLE: /home/sam/.rvm/rubies/ruby-1.9.3-p0/bin/ruby 
EXECUTABLE DIRECTORY: /home/sam/.rvm/gems/[email protected]/bin 
RUBYGEMS PLATFORMS: 
    ruby 
    x86-linux 
GEM PATHS: 
    /home/sam/.rvm/gems/[email protected] 
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/[email protected]/bundler/gems 
    ~/.rvm/gems/[email protected]/gems 
Gems used for 'hope': 
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     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/xpath-0.1.4 
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    rspec-expectations (2.7.0) 
     ~/.rvm/gems/[email protected]/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)) 
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    activemodel (bundled(3.1.0)) 
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    client_side_validations (3.1.4) 
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    cocoon (bundled(1.0.15)) 
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    diff-lcs (1.1.3) 
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    sprockets (2.0.3) 
     ~/.rvm/gems/[email protected]/gems/sprockets-2.0.3 
    rack-ssl (1.3.2) 
     ~/.rvm/gems/[email protected]/gems/rack-ssl-1.3.2 
    simple_form (1.5.2) 
     ~/.rvm/gems/[email protected]/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/[email protected]/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) 
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    mocha (bundled(0.10.3)) 
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    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/[email protected]/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) 
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    i18n (0.6.0) 
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    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)) 
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    pg (0.13.2) 
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    metaclass (0.0.1) 
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    builder (3.0.0) 
     ~/.rvm/gems/[email protected]/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 
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    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)) 
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    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/[email protected]/gems/warden-1.1.0 
    rails (3.1.0) 
     ~/.rvm/gems/[email protected]/gems/rails-3.1.0 
    sass-rails (3.1.5) 
     ~/.rvm/gems/[email protected]/gems/sass-rails-3.1.5 
    capybara-firebug (1.0.1) 
     ~/.rvm/gems/[email protected]/gems/capybara-firebug-1.0.1 
    rspec (2.7.0) 
     ~/.rvm/gems/[email protected]/gems/rspec-2.7.0 
    actionpack (3.1.0) 
     ~/.rvm/gems/[email protected]/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/[email protected]/gems/mime-types-1.17.2 
    capybara (bundled(1.1.2)) 
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    nokogiri (1.5.0) 
     ~/.rvm/gems/[email protected]/gems/nokogiri-1.5.0 
    rake (0.9.2.2) 
     ~/.rvm/gems/[email protected]/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/[email protected]/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) 
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    metaclass (bundled(0.0.1)) 
     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/metaclass-0.0.1 
    launchy (2.0.5) 
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    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/[email protected]/gems/polyglot-0.3.3 
    factory_girl (bundled(2.4.0)) 
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    tilt (bundled(1.3.3)) 
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    uglifier (1.2.3) 
     ~/.rvm/gems/[email protected]/gems/uglifier-1.2.3 
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     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/warden-1.1.0 
    coffee-script-source (1.2.0) 
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    execjs (bundled(1.2.13)) 
     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/execjs-1.2.13 
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     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/guard-spork-0.5.1 
    ffi (1.0.11) 
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    arel (bundled(2.2.1)) 
     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/arel-2.2.1 
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    kaminari (0.13.0) 
     ~/.rvm/gems/[email protected]/gems/kaminari-0.13.0 
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    execjs (1.3.0) 
     ~/.rvm/gems/[email protected]/gems/execjs-1.3.0 
    tilt (1.3.3) 
     ~/.rvm/gems/[email protected]/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)) 
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    rspec-rails (2.7.0) 
     ~/.rvm/gems/[email protected]/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/[email protected]/gems/tzinfo-0.3.31 
    bcrypt-ruby (3.0.1) 
     ~/.rvm/gems/[email protected]/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) 
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     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/addressable-2.2.6 
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     ~/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)) 
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    builder (bundled(3.0.0)) 
     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/builder-3.0.0 
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    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) 
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    addressable (2.2.6) 
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    haml (3.1.4) 
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    sass (bundled(3.1.12)) 
     ~/Documents/RoR/course_builder/CDPATH=/ruby/1.9.1/gems/sass-3.1.12 
    hike (1.2.1) 
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     ~/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/[email protected]/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/[email protected]/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/[email protected]/gems/jquery-rails-1.0.19 
    json (1.6.5) 
     ~/.rvm/gems/[email protected]/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/[email protected]/gems/rack-cache-1.0.3 
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     ~/.rvm/gems/[email protected]/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/[email protected]/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)) 
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    multi_json (1.0.4) 
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    xpath (0.1.4) 
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    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/[email protected]/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/[email protected]/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/[email protected]/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/[email protected]/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/[email protected]/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/[email protected]/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/[email protected]/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/[email protected]/gems/railties-3.1.0 
    ansi (1.4.2) 
     ~/.rvm/gems/[email protected]/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/[email protected]/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

如果键入RVM，我得到：

= 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

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

输入“rvm”是干什么的？ ruby -v怎么样？ – sunnyrjuneja 2012-02-28 04:12:00

请参阅上面的rvm结果编辑，ruby -v结果 – simo 2012-02-28 04:19:51

您是否真的安装了rvm？你是否在命令行上使用xxxx来选择你的Ruby和gemset？ – 2012-02-28 04:23:25

答

我不相信您的rvm已正确设置。为了简单起见，我们从一开始就按照这里的步骤开始：

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

安装在命令行。

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

打开您的主目录中的.bashrc文件夹。

user$ vim .bashrc

编辑和添加：

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

来源的。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

如果返回

rvm is a function

我们是很好的。检查您是否具备所有先决条件：

rvm requirements

根据需要进行安装。选择你最喜欢的红宝石的味道（它似乎是1.8.7，如果是的话，请按照确切的命令或将其替换为您的选择）。

rvm install 1.8.7

当其完成后，

rvm use 1.8.7 --default

如果没有工作，请通过运行

which ruby

谢谢Sunny，我已经解决了这个问题，我应该在做任何事之前先使用gemset！对不起，但是，我是新手到RVM .. – simo 2012-02-29 11:04:20

答

尝试做任何rails - 相关运行之前，在命令行中/bin/bash --login更新后东东。如果有效，请在您打开的每个新命令行中再次执行此操作。

rails 3，为什么我不能在ubuntu上使用命令行？

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