some tips about rb
gem源 https://ruby.taobao.org/
$ gem sources –add https://gems.ruby-china.org/ –remove https://rubygems.org/
$ gem sources -l
*** CURRENT SOURCES ***
https://gems.ruby-china.org
# 请确保只有 gems.ruby-china.org
$ gem install rails
rbenv install 加速
默认cache路径是~/.rbenv/cache，把从taboo.org下载下来的源码包放进去再rbenv install就行了。
ps，编译安装用的组建叫ruby-build，github上和rbenv同一个用户的repo，有其他问题可以上去看readme