检查 Linux 版本,修改使用镜像源

cat /etc/*-release

Jessie

网易镜像

mv /etc/apt/sources.list /etc/apt/sources.list.bak
curl -o /etc/apt/sources.list http://mirrors.163.com/.help/sources.list.jessie

http://mirrors.163.com/.help/debian.html

阿里云镜像

https://mirrors.aliyun.com/help/debian