debian容器更新source.list

cat > /etc/apt/sources.list
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye main contrib non-free
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-updates main contrib non-free
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ bullseye-backports main contrib non-free
deb http://mirrors.tuna.tsinghua.edu.cn/debian-security bullseye-security main contrib non-free
ctrl+d