转自：http://www.haorooms.com/post/gem_not_use
最近在安装SASS的时候，用到gem命令，但是运行出行如下错误！
C:\Users\len>gem install sassERROR: While executing gem ... (Gem::RemoteFetcher::FetchError) Errno::ETIMEDOUT: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failedbecause connected host has failed to respond. - connect(2) for "rubygems.global.ssl.fastly.net" port 443 (https://api.rubygems.org/quick/Marshal.4.8/sass-3.4.13.gemspec.rz)原因是ruby 的gem被和谐了，现在淘宝的ruby工程师架设了rubygems的国内镜像。使用方法如下：
$ gem sources --remove https://rubygems.org/$ gem sources -a https://ruby.taobao.org/$ gem sources -l*** CURRENT SOURCES ***https://ruby.taobao.org然后在运行gem命令就可以了！
C:\Users\len>gem install sassFetching: sass-3.4.13.gem (100%)Successfully installed sass-3.4.13Parsing documentation for sass-3.4.13Installing ri documentation for sass-3.4.13Done installing documentation for sass after 5 seconds1 gem installed关于sass入门教程请看：http://www.haorooms.com/post/sass_css