Ubuntu15.04安装KDE Plasma 5.3桌面环境_百度经验
http://jingyan.baidu.com/article/bad08e1ee280e709c8512185.html
ubuntu下安装kde Plasma
sudo apt-add-repository ppa:kubuntu-ppa/next-backports
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install kubuntu-plasma5-desktop plasma-workspace-wallpapers
从Ubuntu中移除桌面环境Plasma
如果你想恢复更改，用下面几条命令就可以从Ubuntu14.10中除去KDE Plasma
sudo apt-get install ppa-purge
sudo apt-get remove kubuntu-plasma5-desktop
sudo ppa-purge ppa:kubuntu-ppa/next