debian版本
root@l:~# cat /etc/issue Debian GNU/Linux 10 \n \l
更新源
mv /etc/apt/sources.list /etc/apt/sources.list.bak vi /etc/apt/sources.list
修改sources.list文件内容，删除默认的内容，改成国内源：
deb http://mirrors.aliyun.com/debian/ buster main non-free contrib deb http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib deb http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib deb http://mirrors.aliyun.com/debian-security/ buster/updates main non-free contrib deb-src http://mirrors.aliyun.com/debian/ buster main non-free contrib deb-src http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib deb-src http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib deb-src http://mirrors.aliyun.com/debian-security/ buster/updates main non-free contrib
然后执行更新命令:
apt-get update apt-get upgrade
2022-09-05 
