先查看当前的ruby源
$ gem sources -l
$ gem source -r https://gems.ruby-china.org/
添加新的ruby源
$ gem sources -a https://gems.ruby-china.com/
查看当前ruby源确保只有一个确保只有
gems.ruby-china.com/
先查看当前的ruby源
$ gem sources -l
$ gem source -r https://gems.ruby-china.org/
添加新的ruby源
$ gem sources -a https://gems.ruby-china.com/
查看当前ruby源确保只有一个确保只有
gems.ruby-china.com/
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