我想知道，在获得完整的“Lubuntu”体验的同时，推荐在 Ubuntu 19.04 上安装 LXDE 的方法是什么？我尝试运行以下命令：
>$ sudo apt install lubuntu-desktop
...
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 resolve the situation:
The following packages have unmet dependencies:
lubuntu-desktop : Depends: ubuntu-release-upgrader-qt but it is not going to be installed
Recommends: plasma-discover but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
我知道我可以这样做sudo apt install lxde，但是这是否提供了 lubuntu-desktop 的所有功能？还是只是一个简化的默认 LXDE 安装？
我尝试执行 aptupdate和dist-upgrade，但没有任何变化。