Ubuntu-18.04更改安装源为国内源

　　环境查看

　　修改源文件

1	/ etc / apt / sources. list

　　备份配置文件后把文件内容替换如下

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deb http: / / mirrors.aliyun.com / ubuntu /  bionic main restricted universe multiverse deb - src http: / / mirrors.aliyun.com / ubuntu /  bionic main restricted universe multiverse   deb http: / / mirrors.aliyun.com / ubuntu /  bionic - security main restricted universe multiverse deb - src http: / / mirrors.aliyun.com / ubuntu /  bionic - security main restricted universe multiverse   deb http: / / mirrors.aliyun.com / ubuntu /  bionic - updates main restricted universe multiverse deb - src http: / / mirrors.aliyun.com / ubuntu /  bionic - updates main restricted universe multiverse   deb http: / / mirrors.aliyun.com / ubuntu /  bionic - proposed main restricted universe multiverse deb - src http: / / mirrors.aliyun.com / ubuntu /  bionic - proposed main restricted universe multiverse   deb http: / / mirrors.aliyun.com / ubuntu /  bionic - backports main restricted universe multiverse deb - src http: / / mirrors.aliyun.com / ubuntu /  bionic - backports main restricted universe multiverse

　　源来源于：https://opsx.alibaba.com/mirror 找到Ubuntu查看帮助

　　更新

1 2	sudo apt - get update sudo apt - get upgrade