更换ruby源----RubyGems 镜像出错

执行命令:

gem sources --add https://ruby.taobao.org/
报错信息：

Error fetching https://ruby.taobao.org/:

    SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (https://rubygems-china.oss-cn-hangzhou.aliyuncs.com/specs.4.8.gz)

https连接出错，试试看http，或者换一个镜像看看。