怎么解决 “ubuntu系统图标全部变成xxx"

Question

今天在装openoffice,结果让我崩溃的事情发生了。

http://askubuntu.com/questions/298781/how-can-i-install-openoffice
按照这个网址

敲了如下命令
sudo apt-get remove --purge libreoffice*
sudo apt-get clean
sudo apt-get autoremove
Then to install OpenOffice you do:

sudo add-apt-repository ppa:upubuntu-com/openoffice
sudo apt-get update
sudo apt-get install apache-openoffice

重启，结果出现恶心的事情。
系统打开，结果不管是系统图标还是软件图标全部变成xxx
无语了。
怎么解决这个问题。

Answer 1

Reinstall ubuntu-desktop

Answer 2

What is xxx?
If it disappears, it seems that something went wrong during autoremove. You can consider checking the apt log and reinstalling all the deleted ones. However, the easiest way is to reinstall (Linux also needs to be reinstalled sometimes)