国内网络环境问题导致失败

[root@localhost ~]# gem install redis
ERROR:  Could not find a valid gem 'redis' (>= 0), here is why:
          Unable to download data from https://rubygems.org/ - no such name (https://rubygems.org/latest_specs.4.8.gz)

方法一:

$ 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

现在改成 http s://ruby.taobao.org/

方法二:  回家搞. 我目前在公司的网络是不行的,家里的网络就可以.  或者升级ruby版本,这个我没试过. 参考  https://ruby-china.org/topics/13086