yum install VirtualBox-4.2 -y
其他依赖包都没问题了，就是这virtual box自己太大，网速不给力，下一会儿就断掉了。如：
Install 55 Package(s)

Total size: 112 M
Total download size: 71 M
Installed size: 275 M
Downloading Packages:
http://download.virtualbox.org/virtualbox/rpm/el/6/x86_64/VirtualBox-4.2-4.2.26_95022_el6-1.x86_64.rpm : [Errno 12] Timeout on http://download.virtualbox.org/virtualbox/rpm/el/6/x86_64/VirtualBox-4.2-4.2.26_95022_el6-1.x86_64.rpm : (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds')
Trying other mirror.

Error Downloading Packages:
VirtualBox-4.2-4.2.26_95022_el6-1.x86_64: failure: VirtualBox-4.2-4.2.26_95022_el6-1.x86_64.rpm from virtualbox: [Errno 256] No more mirrors to try.

我可以不可以在另一台网速快的电脑上下载好放到服务器上，再来安装？