centos6.4、6.5、7.0环境下载及安装

centos6.4、6.5、7.0下载地址：

http://www.cnblogs.com/zhwl/p/3657958.html或

http://www.linuxdown.net/CentOS/2014/0928/3371.html

centos6.5安装教程：

http://jingyan.baidu.com/article/3065b3b6f642b8becef8a451.html

http://jingyan.baidu.com/article/25648fc1a235c99191fd0008.html