
Ubuntu日本語フォーラム

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ARM用のクロスコンパイル環境を作るために、sources.listにports.ubuntu.comを追加しているのですが、
国内のミラーサーバーに変更したところ、sudo apt updateを実行したときに一部ファイルが見つからなくなります。
解決策をお持ちの方はいらっしゃいますか?
実行環境:Ubuntu 20.04 LTS x86_64 (Windows10 WSL)
deb [arch=amd64] http://jp.archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse deb [arch=amd64] http://jp.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse deb [arch=amd64] http://jp.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse deb [arch=amd64] http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal main restricted universe multiverse deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal-updates main restricted universe multiverse deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal-backports main restricted universe multiverse deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal-security main restricted universe multiverse
こちらは正常に動作します。
deb [arch=amd64] http://jp.archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse deb [arch=amd64] http://jp.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse deb [arch=amd64] http://jp.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse deb [arch=amd64] http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse deb [arch=arm64] http://jp.archive.ubuntu.com/ubuntu-ports/ focal main restricted universe multiverse deb [arch=arm64] http://jp.archive.ubuntu.com/ubuntu-ports/ focal-updates main restricted universe multiverse deb [arch=arm64] http://jp.archive.ubuntu.com/ubuntu-ports/ focal-backports main restricted universe multiverse deb [arch=arm64] http://ports.ubuntu.com/ubuntu-ports/ focal-security main restricted universe multiverse
こちらは
E: Failed to fetch http://jp.archive.ubuntu.com/ubuntu-ports/dists/focal/main/cnf/Commands-amd64 404 Not Found [IP: 160.26.2.187 80] E: Failed to fetch http://jp.archive.ubuntu.com/ubuntu-ports/dists/focal-updates/main/cnf/Commands-amd64 404 Not Found [IP: 160.26.2.187 80] E: Failed to fetch http://jp.archive.ubuntu.com/ubuntu-ports/dists/focal-backports/main/cnf/Commands-amd64 404 Not Found [IP: 160.26.2.187 80] E: Some index files failed to download. They have been ignored, or old ones used instead.
とエラーが出ます。
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