我目前正在运行 21.04。我想升级到 21.10，但当我尝试通过单击按钮（见图）开始升级时，窗口只是关闭，仅此而已。
什么也没有写/var/log/apt/history.log或term.log
我从命令行运行
sudo do-release-upgrade并得到以下响应：
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife
我按照此处的说明更改了我的 sources.list 文件：如何安装软件或从旧的不受支持的版本升级？
但当我跑步时sudo apt-get update我得到
Hit:1 https://dl.google.com/linux/chrome/deb stable InRelease
Ign:2 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64 InRelease
Hit:3 https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64 Release
Ign:5 http://old-releases.ubuntu.com/ubuntu hirsute InRelease
Ign:6 http://old-releases.ubuntu.com/ubuntu hirsute-updates InRelease
Ign:7 http://old-releases.ubuntu.com/ubuntu hirsute-backports InRelease
Ign:8 http://old-releases.ubuntu.com/ubuntu hirsute-security InRelease
Err:9 http://old-releases.ubuntu.com/ubuntu hirsute Release
404 Not Found [IP: 91.189.91.123 80]
Err:10 http://old-releases.ubuntu.com/ubuntu hirsute-updates Release
404 Not Found [IP: 91.189.91.123 80]
Err:11 http://old-releases.ubuntu.com/ubuntu hirsute-backports Release
404 Not Found [IP: 91.189.91.123 80]
Err:12 http://old-releases.ubuntu.com/ubuntu hirsute-security Release
404 Not Found [IP: 91.189.91.123 80]
如果我然后运行sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
cuda cuda-drivers
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
我修改了 source.list 文件，使用 archive 而不是 old-releases，然后运行sudo apt update，一切正常。然后我运行了“sudo apt dist-upgrade”，结果
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
然后我跑了
sudo do-release-upgrade
结果如下：
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
答案1
事实证明，主要问题是我有两个手动安装的包（cuda、cuda-drivers）没有更新。
根据这里的答案：askubuntu.com/questions/601我需要
谨慎解决方案2：
谨慎的解决方案是运行 sudo apt-get install [保留的软件包列表]。在大多数情况下，这将为保留的软件包提供成功升级所需的内容。
sudo apt-get install cuda cuda-drivers
安装了这些软件包。我按照上述命令输出的指示重新启动，然后尝试通过软件更新程序启动升级。这似乎解决了问题。