安装 mate官网的指导http://wiki.mate-desktop.org/download
出现：
sudo apt-get install mate-desktop-environment
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:
mate-desktop-environment : Depends: mate-desktop-environment-core (= 1.8.0+7~ppa1~trusty1) but it is not going to be installed
Recommends: pluma (>= 1.8.0) but it is not going to be installed
Recommends: mate-power-manager (>= 1.8.0) but it is not going to be installed
Recommends: galculator but it is not installable
Recommends: mate-applets (>= 1.8.0) but it is not going to be installed
Recommends: mate-media (>= 1.8.0) but it is not going to be installed
Recommends: ffmpegthumbnailer but it is not installable
E: Unable to correct problems, you have held broken packages.
我试过收到装，但说找不到包
有没有大神成功安装过的，怎么解决依赖

0. http://packages.ubuntu.com/search?suite ... chon=names
mate-desktop-environment mate-desktop-environment-core mate-desktop-environment-extras 自 Ubuntu 14.10 才出現在 Ubuntu universe 套件庫

1. Ubuntu 14.04 LTS (Trusty Thar) 需要增加 ppa 套件庫
http://wiki.mate-desktop.org/download

The Ubuntu MATE Developers utilize a MATE 1.8.1 PPA Repo ported from Debian for use with the Trusty (14.04) Ubuntu MATE Remix.

1-1. Add Repository

You may add this repo to your apt sources via the following commands:

sudo apt-add-repository ppa:ubuntu-mate-dev/ppa
sudo apt-add-repository ppa:ubuntu-mate-dev/trusty-mate

1-2. Install MATE 1.8.1

First make sure your package list and packages are up-to-date by running:

sudo apt-get update
sudo apt-get upgrade

1-2-1. Vanilla MATE

You can choose to install Vanilla MATE by picking one of the apt-get options below.

This will install the base packages required for a minimal MATE desktop

sudo apt-get install mate-desktop-environment-core

This will install the complete MATE desktop

sudo apt-get install mate-desktop-environment

This will install the complete MATE desktop including a few extras (Most Users Will Want This)

sudo apt-get install mate-desktop-environment-extras

1-2-2. Ubuntu MATE

Alternatively you may choose to install Ubuntu MATE Remix.

Ubuntu MATE is a more comprehensive option that offers a slightly tweaked layout, configuration, and themes to integrate into Ubuntu in a more seamless fashion. This will install the complete MATE Desktop Environment as well as LightDM and numerous other applications to provide a full and well rounded desktop.

sudo apt-get install ubuntu-mate-core ubuntu-mate-desktop

2. Ubuntu 14.10 (Utopic Unicorn) 不需要增加 ppa 套件庫 但是需要把 universe 套件庫加入 軟體來源
sudo apt-get install mate-desktop-environment-extras
2-1. mate-desktop-environment 是 mate-desktop-environment-extras 相依套件
mate-desktop-environment-core 是 mate-desktop-environment 相依套件
會一起安裝

3. 15.04 版發行時 Ubuntu MATE 有沒有希望進入官方認可的 flavor ?
http://ubuntuforums.org/showthread.php?t=2248632
Ubuntu MATE to be an official flavor in 15.04?