from:https://wiki.centos.org/HowTos/Virtualization/VirtualBox
Installing VirtualBox
cd /etc/yum.repos.d wget http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo yum --enablerepo=epel install dkms yum install VirtualBox-5.1
Making USB Work in VirtualBox
mkdir /vbusbfs
echo "none /vbusbfs usbfs rw,devgid=$(awk -F : ‘/vboxusers/ {print $3}‘ /etc/group),devmode=664 0 0" >> /etc/fstab
mount -a
原文：http://www.cnblogs.com/zhishuai/p/7912590.html