Ubuntu 安裝 QT5

 https://www.qt.io/download-open-source/#section-2

Qt 5.6.0 for Linux 64-bit
 http://download.qt.io/archive/qt/5.6/5.6.0/
 http://download.qt.io/official_releases/qt/5.6/5.6.0/qt-opensource-linux-x64-5.6.0.run

Qt Creator 3.6.1 for Linux/X11 64-bit
 http://download.qt.io/official_releases/qtcreator/3.6/3.6.1/qt-creator-opensource-linux-x86_64-3.6.1.run

QT5.5
 檔案下載
  https://www.qt.io/download-open-source/
  Qt 5.5.0 for Linux 64-bit (532 MB)    (info)
   http://download.qt.io/official_releases/qt/5.5/5.5.0/qt-opensource-linux-x64-5.5.0-2.run
  http://download.qt.io/archive/qt/5.5/5.5.0/

 下載變更檔案
  sudo chmod +x qt-opensource-linux-x64-5.5.0-2.run
 安裝程式
  sudo qt-opensource-linux-x64-5.5.0-2.run

QT4.8.6
  http://download.qt.io/archive/qt/4.8/4.8.6/
http://blog.sina.com.cn/s/blog_4d661a8c0100jnpq.html  

QT Qidgets Applicaption會使用到 OpenGL
請參考這篇 Howto Install OpenGL Development Environment
  http://wiki.ubuntu-tw.org/index.php?title=Howto_Install_OpenGL_Development_Environment#.E5.AE.89.E8.A3.9DOpenGL_Library