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无法更新-PPA 没有发布文件

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无法更新-PPA 没有发布文件 
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://ppa.launchpad.net/noobslab/icons2/ubuntu bionic 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://ppa.launchpad.net/ravefinity-project/ppa/ubuntu bionic 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.

答案1

这仅仅意味着这两个存储库尚未针对 18.04 进行更新。您可以尝试编辑以/etc/apt/sources.list替换或显示最新版本。bionicartful

如果您单击问题中的链接，然后单击dists，您将看到哪些版本可用。

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