ubuntu Error fetching https://gems.ruby-china.org/: Errno::ECONNREFUSED: Connection refused2022-12-27 08:11:27排除网络原因的前提下 是 权限问题 用 sudo 来 执行命令即可 sudo gem sources -a https://gems.ruby-china.org/上一篇：【内核】linux内核启动流程详细分析下一篇：[CodeForce]356D Bags and Coins