ubuntu 18.10 cosmic 版本出现 apt 更新错误

Question

问题：错误 404 代码状态http://archive.ubuntu.com/ubuntu cosmic InRelease

Ubuntu 18.10 宇宙生命终结

从昨天开始，apt install 命令不再有效，我尝试升级我的系统版本，但我遇到了与 apt-get update 命令相同的错误

$ apt update
Ign:1 http://archive.ubuntu.com/ubuntu cosmic InRelease
Ign:2 http://security.ubuntu.com/ubuntu cosmic-security InRelease
Ign:3 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease
Ign:4 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease
Err:5 http://security.ubuntu.com/ubuntu cosmic-security Release
  404  Not Found [IP: 91.189.88.173 80]
Err:6 http://archive.ubuntu.com/ubuntu cosmic Release
  404  Not Found [IP: 91.189.88.31 80]
Err:7 http://archive.ubuntu.com/ubuntu cosmic-updates Release
  404  Not Found [IP: 91.189.88.31 80]
Err:8 http://archive.ubuntu.com/ubuntu cosmic-backports Release
  404  Not Found [IP: 91.189.88.31 80]
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu cosmic-security Release' does not have 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.
E: The repository 'http://archive.ubuntu.com/ubuntu cosmic Release' does not have 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.
E: The repository 'http://archive.ubuntu.com/ubuntu cosmic-updates Release' does not have 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.
E: The repository 'http://archive.ubuntu.com/ubuntu cosmic-backports Release' does not have 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.

Answer 1

这些存储库仍然可以在http://old-releases.ubuntu.com/ubuntu 上找到。您可以在/etc/apt/sources.list中进行更改，替换出现的所有http://archive.ubuntu.com与http://old-releases.ubuntu.com。

之后， apt-get upgrade 将再次起作用。

有关处理不再受支持的版本的更多信息，请访问https://help.ubuntu.com/community/EOLUpgrades

Answer 2

最后我强制降级以更改 source.list ......我跟着这篇文章：https : //linuxconfig.org/how-to-downgrade-ubuntu-linux-system-to-its-previous-version