ubuntu 下shell 命令的学习1----（编写自动化安装脚本）

     今天安装opencv2.3.0在自己的机器上，因为觉得用脚本执行一系列安装的命令比较方便，所有花了一天的时间初步学习了怎么编写最简单的shell 脚本。

     首先安装Opencv2.3.0需要cmake 配合。所以去官网上下载了cmake2.8的源码进行编译安装。

     其实安装cmake 的步骤并不复杂，需要先安装g++ 然后在cmake 的目录里面make && make install 。但是今天要使用shell 脚本来执行自动下载和安装就比较麻烦了。附上源代码。

     代码本身并作过多的解释，应该很容易看得懂，就是首先下载，然后解压，然后判断当前的系统是否已经安装了g++，之后在编译安装。

     不过最要命的问题是在执行shell脚本的时候会出现:unexpected operator.这样的错误。查阅资料后发现了解决的方法，在我的另外一篇文字中http://blog.csdn.net/bush2582/article/details/20140871

    之后，就顺顺利利的搞定了。

########################################################################## File Name: Install_cmake.sh# Author: ma6174# mail: [e-mail]# Created Time: 2014年02月28日 星期五 13时32分53秒##########################################################################!/bin/bash############################################### FunctionName:echocolor# Author: bush2582# Role:the output will have color# Created Time: ##############################################echocolor(  ){  echo -e "\e[0;33m${@}\e[0m";}############################################### FunctionName:InstallGCC# Author: bush2582# Role:check g++ is already in system# Created Time: ##############################################function InstallGCC (  ){which g++;if [ $? -eq 1 ];thenread -p " g++ is not installed in this system do you want to install? (Y/y/n/N) " ynInstall_GCC;if [ $ynInstall_GCC = "Y" ] || [ $ynInstall_GCC = "y" ] ;then#echo " now we will install g++ ";echocolor "now we will install g++"sudo apt-get install g++;fielseechocolor "g++ already install in this system ";fi}############################################### FunctionName:InstallCmake# Author: bush2582# Role:install Cmake# Created Time: ##############################################function InstallCmake(  ){  InstallGCC;  echocolor " now we will star the program that CMake is installed in this system ";  cd cmake-2.8.0;  ./configure;  sudo make;  sudo make install;  exit 0;}#########################################################################read -p "Do you want to download Cmake? (Y/y/n/N)?" downynif [ $downyn = "Y" ] || [ $downyn = "y" ];then wget http://down1.chinaunix.net/distfiles/cmake-2.8.0.tar.gz;echocolor "now Staring Tar cmake";tar -xvf cmake-2.8.0.tar.gz;elseechocolor "now Staring Tar cmake";tar -xvf cmake-2.8.0.tar.gz;firead -p " Do you want to install camke now (Y/y/n/N)? " ynif [ $yn = "y"  ] || [ $yn = "Y"  ] ;thenInstallCmake;elseexit 0;fi

######################################################################## File Name: LoadOpencv.sh# Author: ma6174# mail: [e-mail]# Created Time: 2014年02月28日 星期五 10时46分11秒##########################################################################!/bin/bash#--------------------------------------------## FunctionName:echocolor# Author: bush2582# Role:the output will have color# Created Time: #--------------------------------------------#echocolor(  ){  echo -e "\e[0;33m${@}\e[0m";  }read -p "Do you want to download Opencv-2.3.0? (Y/N)" DownLoadOpencvif [ $DownLoadOpencv = "Y" ];thenechocolor "now Staring downLoad Opencv2.3.0 ";wget http://nchc.dl.sourceforge.net/project/opencvlibrary/opencv-unix/2.3/OpenCV-2.3.0.tar.bz2;echocolor "Staring tar OpenCV-2.3.0.tar.bz2 "tar -xvf OpenCV-2.3.0.tar.bz2elsetar -xvf OpenCV-2.3.0.tar.bz2echocolor "Staring tar OpenCV-2.3.0.tar.bz2 "ficd OpenCV-2.3.0sudo mkdir relesecd releseread -p "Please input Dir which you want to install " Dirsudo cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=$Dir -D BUILD_PYTHON_SUPPORT=ON ..read -p  "now we will star opencv make&&install  in $Dir .Do you want to continue?( Y/N )  " GoOnif [ $GoOn = "Y"  ] ;thensudo make sudo make installelseexit 0;fi