debian11更換阿里源

//1.先備份
cp /etc/apt/sources.list /etc/apt/sources.list.bak

//2.清空
echo " " > /etc/apt/sources.list

//3.寫阿里源
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.清空緩存
apt-get clean
apt-get update