用光盘最小安装了linux发行版debain 8系统，后需在线安装一些软件工具集，根据相关提示，确认是安装源的问题。因此需要修改apt的源。
debain源的版本区分
- 5是Debian
- 6是squeeze
- 7是wheezy
- 8是jessie
- 9是stretch
步骤
- 修改文件：vim /etc/apt/sources.list，在文件中注销含有DVD的哪一行，添加你需要的对应版本的源
- 执行apt-get update
- 安静地等待
以下记录国内几个jessie源
163的源
deb http://mirrors.163.com/debian/ jessie main non-free contrib
deb http://mirrors.163.com/debian/ jessie-updates main non-free contrib
deb http://mirrors.163.com/debian/ jessie-backports main non-free contrib
deb-src http://mirrors.163.com/debian/ jessie main non-free contrib
deb-src http://mirrors.163.com/debian/ jessie-updates main non-free contrib
deb-src http://mirrors.163.com/debian/ jessie-backports main non-free contrib
deb http://mirrors.163.com/debian-security/ jessie/updates main non-free contrib
deb-src http://mirrors.163.com/debian-security/ jessie/updates main non-free contrib
阿里的源
deb http://mirrors.aliyun.com/debian/ jessie main non-free contrib
deb http://mirrors.aliyun.com/debian/ jessie-updates main non-free contrib
deb http://mirrors.aliyun.com/debian/ jessie-backports main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ jessie main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ jessie-updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ jessie-backports main non-free contrib
deb http://mirrors.aliyun.com/debian-security/ jessie/updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian-security/ jessie/updates main non-free contribdeb
http://mirrors.aliyun.com/debian/ jessie-updates main non-free
deb http://mirrors.aliyun.com/debian wheezy main contrib non-free
deb-src http://mirrors.aliyun.com/debian wheezy main contrib non-free
deb http://mirrors.aliyun.com/debian wheezy-updates main contrib non-free
deb-src http://mirrors.aliyun.com/debian wheezy-updates main contrib non-free
deb http://mirrors.aliyun.com/debian-security wheezy/updates main contrib non-free
deb-src http://mirrors.aliyun.com/debian-security wheezy/updates main contrib non-free
中科大源
deb http://mirrors.ustc.edu.cn/debian jessie main contrib non-free
deb-src http://mirrors.ustc.edu.cn/debian jessie main contrib non-free
deb http://mirrors.ustc.edu.cn/debian jessie-proposed-updates main contrib non-free
deb-src http://mirrors.ustc.edu.cn/debian jessie-proposed-updates main contrib non-free
deb http://mirrors.ustc.edu.cn/debian jessie-updates main contrib non-free
deb-src http://mirrors.ustc.edu.cn/debian jessie-updates main contrib non-free
参考内容：
163源帮助：http://mirrors.163.com/.help/debian.html