安装Rails版本3.2.15时出现"Gem :: RemoteFetcher :: UnknownHostError"

我已经成功地在一个带有数据持久性的现场ubuntu usb上安装了rails 3.2.15.

既然我已经习惯了操作系统(Ubuntu 12.04 LTS),我已经将它安装在笔记本电脑上,并且在安装我在现场usb中使用的东西的过程中.

长话短说,我遇到安装Rails的问题.我已经使用相同的说明来安装ruby和rails作为现场usb中的一个:http://ryanbigg.com/2010/12/ubuntu-ruby-rvm-rails-and-you/

但是,我在安装rails时遇到此错误:

错误:执行gem时...(Gem :: RemoteFetcher :: UnknownHostError)没有这样的名字(https://api.rubygems.org/api/v1/dependencies?gems=activemodel)

我用-V来看看发生了什么,但是,作为一般的技术菜鸟,我不知道什么是错的.

这是-V给出的:

〜$ gem install rails -V 3.2.15 HEAD https://api.rubygems.org/latest_specs.4.8.gz 302暂时移动了 https://s3.amazonaws.com/production.s3.rubygems.org/latest_specs. 4.8.gz 200 OK GET https://api.rubygems.org/latest_specs.4.8.gz 302暂时移动获取 https://s3.amazonaws.com/production.s3.rubygems.org/latest_specs.4.8.gz 200确定HEAD https://api.rubygems.org/latest_specs.4.8.gz 302暂时移动HEAD https://s3.amazonaws.com/production.s3.rubygems.org/latest_specs.4.8.gz 304 Not Modified GET https:/ /api.rubygems.org/quick/Marshal.4.8/rails-4.0.2.gemspec.rz 302暂时移动获取 https://bb-m.rubygems.org/quick/Marshal.4.8/rails-4.0.2. gemspec.rz 200 OK HEAD https://api.rubygems.org/api/v1/dependencies 302暂时移动HEAD https://bundler.rubygems.org/api/v1/dependencies 200 OK HEAD https://api.rubygems .org/api/v1/dependencies 302暂时移动了https://bundler.rubygems.org/api/v1/dependencies 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=rai ls 302暂时移动 https://bundler.rubygems.org/api/v1/dependencies?gems=rails 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=rails 302暂时移动GET https://bundler.rubygems.org/api/v1/dependencies?gems=rails 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=railties 302暂时移动获取 https:// bundler .rubygems.org/api/v1/dependencies？gems = railties 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=railties 302暂时移动获取 https://bundler.rubygems.org/ api/v1/dependencies？gems = railties 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=actionmailer 302暂时移动获取 https://bundler.rubygems.org/api/v1/dependencies ？gems = actionmailer 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=actionmailer 302暂时移动获取 https://bundler.rubygems.org/api/v1/dependencies?gems=actionmailer 200确定获取https://api.rubygems.org/api/v1/dependencies?gems=activerecord 302暂时移动获取 https://bundler.rubygems.org/api/v1/dependencies?gems=activerecord 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=activerecord 302暂时移动获取 https://bundler.rubygems .org/api/v1/dependencies？gems = activerecord 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=actionpack 302暂时移动获取 https://bundler.rubygems.org/api/ v1/dependencies？gems = actionpack 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=actionpack 302暂时移动获取 https://bundler.rubygems.org/api/v1/dependencies?gems = actionpack 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=activesupport 302暂时移动获取 https://bundler.rubygems.org/api/v1/dependencies?gems=activesupport 200 OK GET https://api.rubygems.org/api/v1/dependencies?gems=activesupport 302暂时移动 https://bundler.rubygems.org/api/v1/dependencies?gems=activesupport 200 OK GET https:// api .rubygems.org/api/v1/dependencies？gems = activemodel 302暂时移动获取 https:// b undler.rubygems.org/api/v1/dependencies?gems=activemodel 200 OK ERROR:执行gem时...(Gem :: RemoteFetcher :: UnknownHostError)没有这样的名字(https://api.rubygems.org/api/ v1/dependencies？gems = activemodel)

谁有人可以帮忙？

附加信息:

使用:

ruby 2.1.0p0(2013-12-25修订版44422)[i686-linux]

rvm 1.25.15(稳定)作者:Wayne E. Seguin,Michal Papis [https://rvm.io/]