Debian GNU/Linux ，是一个操作系统及自由软件的发行版，由一群自愿付出时间和精力的用户来维护并更新。它附带了超过 59000 个软件包，这些预先编译好的软件被打包成一种良好的格式以便于用户安装和使用。
下载地址: https://mirrors.aliyun.com/debian/

sudo vi /etc/sudo cp /etc/apt/sources.list /etc/apt/sources.list_backupapt/sources.list

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

# deb http://snapshot.debian.org/archive/debian/20230725T000000Z bullseye main
deb http://deb.debian.org/debian bullseye main
# deb http://snapshot.debian.org/archive/debian-security/20230725T000000Z bullseye-security main
deb http://deb.debian.org/debian-security bullseye-security main
# deb http://snapshot.debian.org/archive/debian/20230725T000000Z bullseye-updates main
deb http://deb.debian.org/debian bullseye-updates main

apt-get clean - 删除所有已下载的包文件
apt-get update - 取回更新的软件包列表信息
apt-get upgrade - 进行一次升级

apt-get install vim