echo "deb https://mirrors.ustc.edu.cn/debian/ bookworm main contrib non-free non-free-firmware" >>/etc/apt/sources.list && \
echo "deb https://mirrors.ustc.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware" >>/etc/apt/sources.list && \
echo "deb https://mirrors.ustc.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware" >>/etc/apt/sources.list && \
echo "deb https://mirrors.ustc.edu.cn/debian-security bookworm-security main contrib non-free non-free-firmware" >>/etc/apt/sources.list && \
echo "deb-src https://mirrors.ustc.edu.cn/debian/ bookworm main contrib non-free non-free-firmware" >>/etc/apt/sources.list && \
echo "deb-src https://mirrors.ustc.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware" >>/etc/apt/sources.list && \
echo "deb-src https://mirrors.ustc.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware" >>/etc/apt/sources.list && \
echo "deb-src https://mirrors.ustc.edu.cn/debian-security bookworm-security main contrib non-free non-free-firmware" >>/etc/apt/sources.list
deb https://mirrors.aliyun.com/debian/ bullseye main non-free contrib
deb-src https://mirrors.aliyun.com/debian/ bullseye main non-free contrib
deb https://mirrors.aliyun.com/debian-security/ bullseye-security main
deb-src https://mirrors.aliyun.com/debian-security/ bullseye-security main
deb https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib
deb-src https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib
deb https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib
deb-src https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib