我正在嘗試使用 cmd sudo apt-get update 更新我的 ubuntu 20.04。但提示取得失敗http://archive.ubuntu.com/ubuntu/dists/focal/main/binary-arm64/Packages404 Not Found [IP: 185.125.190.36 80] E: 取得失敗http://archive.ubuntu.com/ubuntu/dists/focal-updates/main/binary-arm64/Packages404 Not Found [IP: 185.125.190.36 80] E: 取得失敗http://archive.ubuntu.com/ubuntu/dists/focal-security/main/binary-arm64/Packages404 Not Found [IP: 185.125.190.36 80] E: 取得失敗http://archive.ubuntu.com/ubuntu/dists/focal-backports/main/binary-arm64/Packages404 Not Found [IP: 185.125.190.36 80] E: 部分索引檔下載失敗。它們已被忽略,或使用舊的。
我也嘗試過複製新的sources.list,但仍然無法修復它。誰能幫我這個?謝謝