安装Gem
每次你修改Gemfile，或者更具体地说，如果你的附属插件没有安装，调用安装命令来确保你的所有的Gemfile插件可以使用你Rails的应用。
1 $ bundle install 2 Fetching gem metadata from https://rubygems.org/......... 3 Fetching gem metadata from https://rubygems.org/.. 4 Fetching git://github.com/rails/rails.git 5 Fetching git://github.com/rails/activerecord-deprecated_finders.git 6 Fetching git://github.com/rails/arel.git 7 Fetching git://github.com/rails/coffee-rails.git 8 Fetching git://github.com/rails/sprockets-rails.git 9 Fetching git://github.com/rails/sass-rails.git 10 Installing rake (10.0.3) 11 Installing i18n (0.6.1) 12 Installing minitest (4.5.0) 13 Installing multi_json (1.5.0) 14 Installing atomic (1.0.1) 15 Installing thread_safe (0.1.0) 16 Installing tzinfo (0.3.35) 17 Using activesupport (4.0.0.beta) from git://github.com/rails/rails.git 18 (at master) 19 Installing builder (3.1.4) 20 Installing erubis (2.7.0) 21 Installing rack (1.5.0) 22 Installing rack-test (0.6.2) 23 Using actionpack (4.0.0.beta) from git://github.com/rails/rails.git 24 (at master) 25 Installing mime-types (1.19) 26 Installing polyglot (0.3.3) 27 Installing treetop (1.4.12) 28 Installing mail (2.5.3) 29 Using actionmailer (4.0.0.beta) from git://github.com/rails/rails.git 30 (at master) 31 Using activemodel (4.0.0.beta) from git://github.com/rails/rails.git 32 (at master) 33 Using activerecord-deprecated_finders (0.0.3) from 34 git://github.com/rails/activerecord-deprecated_finders.git (at master) 35 Using arel (3.0.2.20120819075748) from git://github.com/rails/arel.git36 (at master) 37 Using activerecord (4.0.0.beta) from git://github.com/rails/rails.git 38 (at master) 39 Installing coffee-script-source (1.4.0) 40 Installing execjs (1.4.0) 41 Installing coffee-script (2.2.0) 42 Installing json (1.7.6) 43 Installing rdoc (3.12) 44 Installing thor (0.17.0) 45 Using railties (4.0.0.beta) from git://github.com/rails/rails.git 46 (at master) 47 Using coffee-rails (4.0.0.beta) from 48 git://github.com/rails/coffee-rails.git (at master) 49 Installing hike (1.2.1) 50 Installing jbuilder (1.0.2) 51 Installing jquery-rails (2.2.0) 52 Using bundler (1.3.0.pre.7) 53 Installing tilt (1.3.3) 54 Installing sprockets (2.8.2) 55 Using sprockets-rails (2.0.0.rc2) from 56 git://github.com/rails/sprockets-rails.git (at master) 57 Using rails (4.0.0.beta) from git://github.com/rails/rails.git 58 (at master) 59 Installing sass (3.2.5) 60 Using sass-rails (4.0.0.beta) from 61 git://github.com/rails/sass-rails.git (at master) 62 Installing sqlite3 (1.3.7) 63 Installing turbolinks (1.0.0) 64 Installing uglifier (1.3.0) 65 Your bundle is complete! Use `bundle show [gemname]` to see where a 66 bundled gem is installed.
安装命令更新所有依赖Gemfile的文件更新到最新版本，不与其他依赖关系的冲突。
您可以选择安装依赖关系，除非这些制定的组不需要依靠选项设置。
1 $ bundle install --without development test
2 $ bundle install --without test
锁定Gem
每次安装或更新，Bundler都会计算应用和存储的依赖关系 。在一个名为gemfile.lock的结果当中。Bundle只能加载特定版本的gems。你此刻用的Gemfile应该是锁着的，对应的版本才会很好地为应用而服务。
打包Gem
您可以在vendor/cache目录中打包所有的gems的应用程序。
1 $ bundle package