VirtualBox中安装增强工具失败

在virtualbox中安装centos6.4后，再安装增强工具失败。

** 安装报错如下 **

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=<directory> and run make again. Stop.

** 解决方法 **

yum install -y kernel-headers

yum install -y kernel-devel

yum install -y gcc*

yum install -y make

检查 uname -r 和 /usr/src/kernels/[version] 是否匹配. 不匹配则yum update令二者兼容

重启服务器，再次安装 增强功能包,ok