如果出现下面这这种情况：
VirtualBox kernel driver not accessible, permission problem. Make sure that the current user has write permissions to /dev/vboxdrv by adding him to the vboxusers groups. Don't forget to logout to take the change effect.
在终端中执行：
sudo /etc/init.d/vboxdrv setup
sudo chmod a+rw /dev/vboxdrv
然后..系统－－系统管理－－用户和组－－管理组，选中vboxusers－－属性－－在组成员中对当前用户打上对号就好了。
