安装compass失败
ERROR: Could not find a valid gem ‘compass‘ (>= 0), here is why: Unable to download data from https://rubygems.org/ - SSL_connect retur ned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed ( https://rubygems.org/latest_specs.4.8.gz)
百思不得其解，实在没有想到会是被墙了，然后找到了淘宝出的一个gem的镜像了，一试立马可用，大喜过望！
$ gem sources --remove https://rubygems.org/ $ gem sources -a https://ruby.taobao.org/ $ gem sources -l *** CURRENT SOURCES *** https://ruby.taobao.org # 请确保只有 ruby.taobao.org $ gem install rails
然后再试一下gem install compass 就可以了
原文：http://www.cnblogs.com/river-lee/p/4210311.html