最近在安裝SASS的時候，用到gem命令，但是執行出行如下錯誤！

C:\Users\len>gem install sass
ERROR:While executing gem ...(Gem::RemoteFetcher::FetchError)Errno::ETIMEDOUT: A connection attempt failed because the connected party di
d not properly respond after a period of time,or established connection failed
because 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被和諧了，現在淘寶的ruby工程師架設了rubygems的國內映象。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

然後在執行gem命令就可以了！

C:\Users\len>gem install sass
Fetching: 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 seconds
1 gem installed