ubuntu 环境下qt的安装

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１．进入下载网址https://www.qt.io/download-open-source/#section-2　下载对应自己系统版本的安装包

２．我是ubuntu16.04　32位只找到在线安装包，qt-unified-linux-x86-2.0.3-1-online.run　

直接运行时显示权限不够：　./qt-unified-linux-x86-2.0.3-1-online.run: 权限不够

执行 $ ls -l　，命令得到权限为：　-rw-rw-r，执行chmod u+x qt-unified-linux-x86-2.0.3-1-online.run 　修改权限然后再运行就成功了，跳出界面安装

３．编译其他人的文件时发现提示，By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Qt5", but
CMake did not find one.

执行：aptitude search qt4 | grep dev,发现库都没安装，

p libavahi-qt4-dev - Development headers for the Avahi Qt 4 int
p libdee-qt4-dev - Qt binding for Dee - development files
p libntrack-qt4-dev - Development package for libntrack-qt4
p libpoppler-qt4-dev - PDF rendering library -- development files
p libqglviewer-dev-qt4 - OpenGL 3D viewer library based on Qt4 - de
p libqjdns-qt4-dev - Simple DNS queries library QT4 wrapper - d
p libqt4-dev - Qt 4 development files
p libqt4-dev-bin - Qt 4 development programs
p libqt4-opengl-dev - Qt 4 OpenGL library development files
p libqt4pas-dev - Development files for Qt4Pas
p libqwt5-qt4-dev - Qt4 widgets library for technical applicat
p libqwtplot3d-qt4-dev - 3D plotting library based on Qt4/OpenGL (d
p libsmokeqt4-dev - Development files for Qt SMOKE libraries
p libsoqt4-dev - Qt4 GUI component toolkit for Inventor - d
p libsource-highlight-qt4-dev - Syntax highlighting library for Qt (develo
p libtelepathy-qt4-dev - Qt 4 Telepathy library (headers and static
p libvtk5-qt4-dev - Visualization Toolkit - A high level 3D vi
p pyqt4-dev-tools - Development tools for PyQt4
p pyqt4.qsci-dev - Development files for Python Qscintilla2 (
p python-qt4-dev - Development files for PyQt4
p qt4-default - Qt 4 development defaults package
p qt4-dev-tools - Qt 4 development tools

然后执行，apt-get install libqt4-dev，安装了最基础的库，编译通过。

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