うちの Orange Pi One は、mpd を入れてネットワークプレーヤーにしています。
Armbian のバージョンを見ると bullseye なので、一度導入したあとに OS 入れ直しているっぽい...
# cat /etc/issue
Armbian 25.2.2 bullseye \l 普段は、タブレットに入れた mpd クライアントから操作しているだけで忘れていたけれど、ターミナルを見たらバージョンが古かった。
久々にアップデートしようかと思ったらエラーになった。
# sudo apt update -y
Get:1 http://deb.debian.org/debian bullseye InRelease [75.1 kB]
Get:2 http://security.debian.org bullseye-security InRelease [27.2 kB]
Get:3 http://deb.debian.org/debian bullseye-updates InRelease [44.0 kB]
Ign:4 http://deb.debian.org/debian bullseye-backports InRelease
Err:6 http://deb.debian.org/debian bullseye-backports Release
404 Not Found [IP: 151.101.66.132 80]
Get:7 https://github.armbian.com/configng stable InRelease [5,467 B]
Get:5 http://armbian.lv.auroradev.org/beta bullseye InRelease [50.6 kB]
Get:8 http://security.debian.org bullseye-security/main armhf Packages [526 kB]
Get:9 https://github.armbian.com/configng stable/main armhf Packages [427 B]
Get:10 http://armbian.lv.auroradev.org/beta bullseye/main armhf Packages [83.3 kB]
Get:11 http://armbian.lv.auroradev.org/beta bullseye/main all Packages [1,584 B]
Get:12 http://armbian.lv.auroradev.org/beta bullseye/main armhf Contents (deb) [2,162 kB]
Get:13 http://armbian.lv.auroradev.org/beta bullseye/main all Contents (deb) [39.1 kB]
Reading package lists... Done
E: The repository 'http://deb.debian.org/debian bullseye-backports Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
N: Repository 'http://security.debian.org bullseye-security InRelease' changed its 'Suite' value from 'oldstable-security' to 'oldoldstable-security'
N: Repository 'http://deb.debian.org/debian bullseye InRelease' changed its 'Suite' value from 'oldstable' to 'oldoldstable'
N: Repository 'http://deb.debian.org/debian bullseye-updates InRelease' changed its 'Suite' value from 'oldstable-updates' to 'oldoldstable-updates'参照先がないと怒られている...
bullseye は Debian 11 で、まだサポート期間中だったはず... と思い見てみるとサポート期間中だ。どうして...
（Debian は 5年サポートが基本で、3年間がメインストリームサポート、残り 2年がセキュリティサポートとなる）
Version support architecture schedule Debian 11 “Bullseye” i386, amd64, armhf and arm64 August 15, 2024 to August 31, 2026 Debian 12 “Bookworm” full architecture list still to be determined June 11, 2026 to June 30, 2028 Debian 13 “Trixie” full architecture list still to be determined August 9, 2028 to June 30, 2030
まぁ、無いものは仕方がないのでググってみたら、先人の知恵が見つかった。
- 参考にしたサイト
https://forums.puri.sm/t/apt-update-error-the-repository-bullseye-backports-release-no-longer-has-a-release-file/28634/2
I replaced this line:deb https://deb.debian.org/debian bullseye-backports mainwith this line:
deb https://archive.debian.org/debian bullseye-backports main
sources.list を置換する。
# diff -u /tmp/sources.list /etc/apt/sources.list
--- /tmp/sources.list 2025-09-26 11:03:16.235330911 +0000
+++ /etc/apt/sources.list 2025-09-26 11:03:29.583010072 +0000
@@ -4,7 +4,8 @@
deb http://deb.debian.org/debian bullseye-updates main contrib non-free
#deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free
-deb http://deb.debian.org/debian bullseye-backports main contrib non-free
+#deb http://deb.debian.org/debian bullseye-backports main contrib non-free
+deb https://archive.debian.org/debian bullseye-backports main contrib non-free
#deb-src http://deb.debian.org/debian bullseye-backports main contrib non-free
deb http://security.debian.org/ bullseye-security main contrib non-free再度アップデートしたら通った。
# sudo apt update -y
Hit:1 http://deb.debian.org/debian bullseye InRelease
Hit:2 http://deb.debian.org/debian bullseye-updates InRelease
Hit:3 http://security.debian.org bullseye-security InRelease
Get:4 https://archive.debian.org/debian bullseye-backports InRelease [48.9 kB]
Hit:5 https://github.armbian.com/configng stable InRelease
Hit:6 http://armbian.lv.auroradev.org/beta bullseye InRelease
Get:7 https://archive.debian.org/debian bullseye-backports/main armhf Packages [396 kB]
Get:8 https://archive.debian.org/debian bullseye-backports/main all Contents (deb) [4,672 kB]
Get:9 https://archive.debian.org/debian bullseye-backports/main armhf Contents (deb) [1,110 kB]
Get:10 https://archive.debian.org/debian bullseye-backports/contrib armhf Packages [4,684 B]
Get:11 https://archive.debian.org/debian bullseye-backports/contrib armhf Contents (deb) [16.3 kB]
Get:12 https://archive.debian.org/debian bullseye-backports/contrib all Contents (deb) [22.2 kB]
Get:13 https://archive.debian.org/debian bullseye-backports/non-free armhf Packages [8,872 B]
Get:14 https://archive.debian.org/debian bullseye-backports/non-free armhf Contents (deb) [3,663 B]
Get:15 https://archive.debian.org/debian bullseye-backports/non-free all Contents (deb) [58.5 kB]
Fetched 6,342 kB in 11s (595 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
85 packages can be upgraded. Run 'apt list --upgradable' to see them.とはいえ、メジャーバージョンアップできるわけではないので、近々 OS 入れ直しかな...