Question

标题说明了一切，每当我尝试安装gem时，就会发生这种情况：

错误：找不到有效的gem'ruby2d'（> = 0），这是原因：无法从https://rubygems.org/下载数据-超时（https://api.rubygems.org/specs.4.8.gz）

我重新安装了ruby来尝试解决此问题，但没有任何运气。另外，我尝试更新rubygems版本，出现此错误：

错误：执行gem时...（Gem :: RemoteFetcher :: UnknownHostError）超时（https://api.rubygems.org/specs.4.8.gz）

 RubyGems Environment:
  - RUBYGEMS VERSION: 2.7.6
  - RUBY VERSION: 2.5.3 (2018-10-18 patchlevel 105) [x64-mingw32]
  - INSTALLATION DIRECTORY: C:/Ruby25-x64/lib/ruby/gems/2.5.0
  - USER INSTALLATION DIRECTORY: C:/Users/julia_ps3fg4w/.gem/ruby/2.5.0
  - RUBY EXECUTABLE: C:/Ruby25-x64/bin/ruby.exe
  - EXECUTABLE DIRECTORY: C:/Ruby25-x64/bin
  - SPEC CACHE DIRECTORY: C:/Users/julia_ps3fg4w/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: C:/ProgramData
  - RUBYGEMS PLATFORMS:
    - ruby
    - x64-mingw32
  - GEM PATHS:
     - C:/Ruby25-x64/lib/ruby/gems/2.5.0
     - C:/Users/julia_ps3fg4w/.gem/ruby/2.5.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:

Answer 1

您似乎在gem配置中缺少源。试试这个。

gem sources -a  http://rubygems.org

它应将您的~/.gemrc文件编辑如下：

---
:backtrace: false
:bulk_threshold: 1000
:sources:
- http://rubygems.org
:update_sources: true
:verbose: true

Answer 2

https://github.com/rubygems/rubygems/issues/2253

TL; DR：某些ipv6请求没有通过。使用ipv4

红宝石不能安装宝石，只能手动

2 个答案: