debian换源

vi /etc/apt/sources.list

deb http://ftp.cn.debian.org/debian jessie main non-free contrib 
deb http://ftp.cn.debian.org/debian jessie-proposed-updates main contrib non-free 
deb http://ftp.cn.debian.org/debian-security jessie/updates main contrib non-free
deb-src http://ftp.cn.debian.org/debian/ jessie main contrib non-free

阿里云镜像：

deb http://mirrors.aliyun.com/debian/ stretch main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ stretch main non-free contrib
deb http://mirrors.aliyun.com/debian-security stretch/updates main
deb-src http://mirrors.aliyun.com/debian-security stretch/updates main
deb http://mirrors.aliyun.com/debian/ stretch-updates main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ stretch-updates main non-free contrib
deb http://mirrors.aliyun.com/debian/ stretch-backports main non-free contrib
deb-src http://mirrors.aliyun.com/debian/ stretch-backports main non-free contrib

华为云镜像：

deb https://mirrors.huaweicloud.com/debian/ stretch main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ stretch main contrib non-free
deb https://mirrors.huaweicloud.com/debian/ stretch-updates main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ stretch-updates main contrib non-free
deb https://mirrors.huaweicloud.com/debian/ stretch-backports main contrib non-free
deb-src https://mirrors.huaweicloud.com/debian/ stretch-backports main contrib non-free

更换源为网易163

网易163源一直是国内许多人选择的对象，不过不知为何，在我这里使用时产生了错误，大家如果也有问题，可以使用下文的中科大源。
以Jessie为例, 编辑/etc/apt/sources.list文件, 在文件最前面添加以下条目(操作前请做好相应备份)

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

更换源为中科大

以Jessie为例, 编辑/etc/apt/sources.list文件, 在文件最前面添加以下条目(操作前请做好相应备份)

deb http://mirrors.ustc.edu.cn/debian stable main contrib non-free
deb-src http://mirrors.ustc.edu.cn/debian stable main contrib non-free
deb http://mirrors.ustc.edu.cn/debian stable-proposed-updates main contrib non-free
deb-src http://mirrors.ustc.edu.cn/debian stable-proposed-updates main contrib non-free

或者直接

sudo sed -i 's/httpredir.debian.org/mirrors.ustc.edu.cn/g' /etc/apt/sources.list