安装virtualbox:
1:下载VirtualBox的RHEL软件库配置文件：
wget http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo
2:安装RPMForge RPMForge也是CentOS官方社区推荐的第三方yum源
rpm -ivh rpmforge-release-0.5.2-1.el6.rf.i686.rpm
官方网站为： http://repoforge.org/
forge-release软件下载页为： http://repoforge.org/use
3:安装DKMS（Dynamic Kernel Module）
yum install dkms
4:安装开发环境和内核：
yum groupinstall "Development Tools"
yum install kernel-devel
5:安装qt和qt-
yum install qt qt-x11
6：下载安装VirtualBox
先在官网下载下来 https://www.virtualbox.org/wiki/Linux_Downloads
7 安装扩展： 未验证
VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.3.16-95972.vbox
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), componentExtPackFile, interface IExtPackFile, callee nsISupports
VBoxManage: error: Context: "Install(fReplace, NULL, ptrProgress.asOutParam())" at line 1140 of file VBoxManageMisc.cpp
8 /etc/init.d/vboxdrv setup 未验证
这里又出现了错误：
Building the VirtualBox Guest Additions kernel modules [FAILED]
Your system does not seem to be set up to build kernel modules.
Look at /var/log/vboxadd-install.log to find out what went wrong.
Once you have corrected it, you can run /etc/init.d/vboxadd setup to build them.
查看错误日志：
/tmp/vbox.o/Makefile.include.header:97: ***
Error: unable to find the source of your current Linux kernel.Specify KERN_DIR= and run make again. Stop.
解决办法：
yum install kernel
yum install kernel-devel
yum install kernel-headers
yum install gcc*
yum install make
reboot
/etc/init.d/vboxdrv setup