//1.先备份 cp /etc/apt/sources.list /etc/apt/sources.list.bak //2.清空 echo " " > /etc/apt/sources.list //3.写阿里源 echo "deb https://mirrors.aliyun.com/debian stable main contrib non-free">>/etc/apt/sources.list echo "deb https://mirrors.aliyun.com/debian stable-updates main contrib non-free">>/etc/apt/sources.list //4.清空缓存 apt-get clean apt-get update