E: The repository 'http://kr.archive.ubuntu.com/ubuntu impish 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.

该错误通常是由于软件源配置文件中包含无效或不可访问的存储库而引起的。为了解决这个问题，你可以尝试以下方法：

1. 编辑软件源配置文件：

   sudo nano /etc/apt/sources.list

2. 在打开的文件中，注释掉或删除包含 `http://kr.archive.ubuntu.com/ubuntu` 的行。可以在行前添加 `#` 注释掉，或直接删除该行。

3. 保存文件并退出编辑器。

4. 更新软件源：

   sudo apt-get update

这样，你的软件源将不再包含无效的存储库，并且可以正常更新系统和安装软件包。

相关问题

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://ppa.launchpadcontent.net/apt-fast/stable/ubuntu jammy InRelease: Splitting up /var/lib/apt/lists/ppa.launchpadcontent.net_apt-fast_stable_ubuntu_dists_jammy_InRelease into data and signature failed W: GPG error: https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy InRelease: Splitting up /var/lib/apt/lists/partial/mirrors.tuna.tsinghua.edu.cn_ubuntu_dists_jammy_InRelease into data and signature failed E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy InRelease' is not signed. 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. W: GPG error: https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates InRelease: Splitting up /var/lib/apt/lists/partial/mirrors.tuna.tsinghua.edu.cn_ubuntu_dists_jammy-updates_InRelease into data and signature failed E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates InRelease' is not signed. 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. W: GPG error: https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports InRelease: Splitting up /var/lib/apt/lists/partial/mirrors.tuna.tsinghua.edu.cn_ubuntu_dists_jammy-backports_InRelease into data and signature failed E: The repository 'https://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports InRelease' is not signed. 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 trusty 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 'https://ppa.launchpadcontent.net/notepadqq-team/notepadqq/ubuntu jammy 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.

这些错误信息表明，apt 在更新软件包时遇到了签名验证失败的问题。这可能是由于存储库中的 GPG 签名已过期或无法验证，或者存储库本身没有签名。

你可以尝试以下方法来解决此问题：

1. 检查你的网络连接是否正常，并确保能够访问相应的存储库。

2. 如果是第一次遇到此问题，你可以尝试更新 apt 的密钥列表。你可以使用以下命令更新密钥列表：

   sudo apt-key adv --refresh-keys --keyserver keyserver.ubuntu.com

3. 如果密钥列表无效，则需要重新导入相关存储库的 GPG 公钥。你可以通过以下命令来导入 GPG 公钥：

   sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys <KEY>

其中，`<KEY>` 是存储库的 GPG 公钥 ID。

4. 如果存储库没有签名，则你需要考虑使用其他可信赖的存储库或联系存储库的维护者寻求帮助。

5. 对于最后两个错误，可能是由于存储库的版本与你的 Ubuntu 版本不兼容所致。你需要检查存储库是否支持你的 Ubuntu 版本，并根据需要将其从源列表中删除。