Ruby 安装

 提示

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

bad response Not Found 404 (http://ruby.taobao.org/specs.4.8.gz)

则 

bogon:~ ComarMet$ gem sources --add https://ruby.taobao.org/ --remove https://rubygems.org/

https://ruby.taobao.org/ added to sources

source https://rubygems.org/ not present in cache

bogon:~ ComarMet$ gem sources -l

*** CURRENT SOURCES ***

https://ruby.taobao.org/

bogon:~ ComarMet$ sudo gem install cocoapods