安装出现如下错误：
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：
#yum install kernel-headers #yum install kernel-devel #yum install gcc* #yum install make
重启，
再次安装,ok