我尝试使用这些指南在 ubuntu 13.04 上安装 Gnome（http://www.omgubuntu.co.uk/2013/04/gnome-3-8-ppa-for-ubuntu-gnome）。它运行得不太好（有一些小故障），所以我尝试卸载它。
我按照说明进行操作，但是当我回到 Unity 时，它很“丑陋”，我看不到桌面（我那里有文件，但没有显示）。
我重新安装了 gnome，并再次清除了所有内容，然后我思考我还卸载了 ubuntu-deskop（按照另一页的建议）
现在 unity 或多或少可以正常工作了，但我仍然看不到我的桌面，而且一些程序（如 evince）也丢失了。如果我尝试sudo apt-get install ubuntu-desktop
我明白了
Reading package lists... Done
Building dependency tree
Reading state information... Done
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:
ubuntu-desktop : Depends: evince but it is not going to be installed
Depends: gnome-control-center but it is not going to be installed
Depends: seahorse but it is not going to be installed
Depends: software-center but it is not going to be installed
Recommends: deja-dup-backend-ubuntuone but it is not going to be installed
Recommends: empathy but it is not going to be installed
Recommends: gnome-control-center-unity but it is not going to be installed
Recommends: thunderbird-gnome-support but it is not going to be installed
Recommends: ubuntuone-client-gnome but it is not going to be installed
Recommends: ubuntuone-control-panel-qt but it is not going to be installed
Recommends: xul-ext-webaccounts but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
例如，我无法安装 evince，因为我得到：
daniel@daniel-linux:~$ sudo apt-get install evince
Reading package lists... Done
Building dependency tree
Reading state information... Done
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:
evince : Depends: evince-common (< 3.7) but 3.8.2-0ubuntu4~raring1 is to be installed
E: Unable to correct problems, you have held broken packages.
我已经尝试过apt-get clean，，apt-get update也apt-get autoremove...我也按照这里给出的步骤操作Gnome 3.8 影响 Ubuntu 13.04 中的 Unity，但我仍然遇到同样的问题。
有什么想法可以让一切重新运转吗？
答案1
为了解决您的“未满足的依赖关系”问题，我建议使用
sudo apt-get -f install。