1. 进入容器
docker exec -it 容器号 /bin/bash
2. mv /etc/apt/source.list /ect/apt/source.list.bak
mv sources.list sources.list.bak
3. deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb 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 main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
保存以上内容为：sources.list
4. docker exec -it 容器号 /bin/bash,进入容器，执行apt-get update
安装vim，解决vi command not found
apt-get install vim
修改~/.bashrc,解决ll，command not found
保存，退出！
执行立即生效命令;
source ~/.bashrc
参考：(7条消息) 解决apt-get下载速度慢的两种方式_Might_Guy.的博客-CSDN博客
Docker基础容器中bash: vi及ll: command not found问题解决 - 西瓜君~ - 博客园 (cnblogs.com)
