镜像源更新为清华源 报错显示 解决方案 做好备份 cp /etc/apt/sources.list /etc/apt/sources.list.bak 查看配置信息 sudo vim /etc/apt/sources.list sudo sed -i 's/cn.archive.ubuntu.com/mirrors.aliyun.com/g' /etc/apt/sources.list sudo apt update