Debian 10 升级 Debian 11
apt update && apt full-upgrade
apt install gcc-8-base完全升级我们当前的 Debian 10 系统
vi /etc/apt/sources.list编辑软件包存储库 /etc/apt/sources.list
把所有deb开头加# 或 全部删除
deb http://deb.debian.org/debian/ bullseye main contrib non-free
deb-src http://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb http://security.debian.org/debian-security bullseye-security main
deb-src http://security.debian.org/debian-security bullseye-security main
deb http://ftp.debian.org/debian bullseye-backports main contrib non-free然后追加上面的内容
apt update && apt full-upgrade开始升级