Debian 11 (bullseye) 软件源

deb http://deb.debian.org/debian/ bullseye main non-free contrib
deb-src http://deb.debian.org/debian/ bullseye main non-free contrib

deb http://security.debian.org/debian-security bullseye-security main
deb-src http://security.debian.org/debian-security bullseye-security main

deb http://deb.debian.org/debian/ bullseye-updates main non-free contrib
deb-src http://deb.debian.org/debian/ bullseye-updates main non-free contrib

deb http://deb.debian.org/debian bullseye-backports main non-free contrib
deb-src http://deb.debian.org/debian bullseye-backports main non-free contrib