新裝了個樹莓派，更新時候發現連不上網，遂換國內源。由于近期AI用習慣了，就沒找官方說明，結果......果然踩雷了。所以還是得看官方提供的說明。
清華開源鏡像站Raspbian 軟件倉庫
1、查看系統架構

$ uname -m
aarch64

提示aarch64用戶直接參考 Debian 幫助

Debian 軟件源

大部分 Debian 的軟件源配置文件使用傳統的 One-Line-Style，路徑為 /etc/apt/sources.list；但是對于容器鏡像，從 Debian 12 開始，其軟件源配置文件變更為 DEB822 格式，路徑為 /etc/apt/sources.list.d/debian.sources。一般情況下，將對應文件中 Debian 默認的源地址 http://deb.debian.org/ 替換為鏡像地址即可。

Debian Buster 以上版本默認支持 HTTPS 源。如果遇到無法拉取 HTTPS 源的情況，請先使用 HTTP 源并安裝：

sudo apt install apt-transport-https ca-certificates

傳統格式（/etc/apt/sources.list）

# 默認注釋了源碼鏡像以提高 apt update 速度，如有需要可自行取消注釋
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware

deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware

deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware

# 以下安全更新軟件源包含了官方源與鏡像站配置，如有需要可自行修改注釋切換
deb https://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
# deb-src https://security.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware

DEB822 格式（/etc/apt/sources.list.d/debian.sources）

Types: deb
URIs: https://mirrors.tuna.tsinghua.edu.cn/debian
Suites: bookworm bookworm-updates bookworm-backports
Components: main contrib non-free non-free-firmware
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

# 默認注釋了源碼鏡像以提高 apt update 速度，如有需要可自行取消注釋
# Types: deb-src
# URIs: https://mirrors.tuna.tsinghua.edu.cn/debian
# Suites: bookworm bookworm-updates bookworm-backports
# Components: main contrib non-free non-free-firmware
# Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

# 以下安全更新軟件源包含了官方源與鏡像站配置，如有需要可自行修改注釋切換
Types: deb
URIs: https://security.debian.org/debian-security
Suites: bookworm-security
Components: main contrib non-free non-free-firmware
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

# Types: deb-src
# URIs: https://security.debian.org/debian-security
# Suites: bookworm-security
# Components: main contrib non-free non-free-firmware
# Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

建議還是去鏡像站復制粘貼，還可以根據選擇的架構、版本自動生成設置文件內容。