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com.canonical.unity.webapps
为了正常工作，Unity Tweak Tool 建议您安装必要的包

我理解这一点非常相似，这个问题与这一个，但没有出现为我工作的答案。尝试安装这些问题中提到的软件包时，apt-get 会抛出以下错误消息：

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies.
 unity-webapps-service : Depends: webapp-container
E: Unable to correct problems, you have held broken packages.

当我尝试安装那里提到的依赖项时，我发现越来越多的依赖项。当我选择“修复损坏的包”时，Synaptic 包管理器会给出错误消息。我怎样才能解决这个问题？

提前致谢，如果您需要更多信息，请发表评论。

更新：运行apt-cache …