当我收到此错误时，我试图将Ruby on Rails安装到我的PC上：
gem install rails - ERROR: While executing gem (Net::HTTPServerException) 407 “Proxy Authentication Required” [on hold]
我试过了：
gem install --http-proxy http://{domain}%5C{username}:{password}@{proxy.address}:{port}/ rails
标题有错误
我也试过：
gem install -p http://pynewbie:mypassword@the-proxy-host.com:8888 rails
并得到错误
ERROR: Could not find a valid gem 'rails' (>= 0), here is why: Unable to download data from https://rubygems.org/ - no such name(https://rubygems.org/specs.4.8.gz)
最好使用代理链来代理命令中的所有请求：
proxychains gem install rails
安装后，您必须在~/.proxychains/proxychains.conf上创建配置文件
代理链 Github