使用 yum 安装 virtualbox 虚拟机

直接下载 virtualbox 包安装时，有时要安装依赖包，比较麻烦，所以用yum来安装比较方便，

步骤如下：

Install Fedora or RHEL Repo Files

cd /etc/yum.repos.d/
 
## Fedora 17/16/15/14/13/12 users
wget http://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo
 
## CentOS 6.2/6.1/6/5.8 and Red Hat (RHEL) 6.3/6.2/6.1/6/5.8 users
wget http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo

Update latest packages and check your kernel version

yum  upgrade

Install VirtualBox Latest Version 4.1 (currently 4.1.18)

yum install VirtualBox-4.1