我仍在過時的 Banana Pi BPI-R1 硬體上運行 Debian 8“Jessy”。但現在，當我嘗試安裝軟體包時，我得到了
WARNING: The following packages cannot be authenticated!
運行後
$ apt update
Ign http://archive.debian.org jessie InRelease
Get:1 http://archive.debian.org jessie-backports InRelease [166 kB]
...
Hit http://archive.debian.org jessie/contrib armhf Packages
Fetched 168 kB in 26s (6457 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
34 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: GPG error: http://archive.debian.org jessie-backports InRelease: The following signatures were invalid: KEYEXPIRED 1587841717 KEYEXPIRED 1668891673
W: GPG error: http://archive.debian.org jessie Release: The following signatures were invalid: KEYEXPIRED 1587841717
事實證明，Debian 密鑰已於 2022 年過期。
基本上我遵循了以下指南https://blog.milliondollarserver.com/2020/06/fix-apt-get-update-error-on-old-debian.html
不幸的是，解決方法並不能解決我的問題。當我嘗試使用包“工作”時，我仍然收到警告：
$ apt install dpkg-sig
Reading package lists... Done
Building dependency tree
Reading state information... Done
...
Install these packages without verification? [y/N]
E: Some packages could not be authenticated
我確認修復已應用：
$ apt-config dump|grep Valid
Acquire::Check-Valid-Until "false";
有任何提示我做錯了什麼嗎？
目前還沒有計劃更換硬體並使用最新的 Debian...;-)