sudo wget http://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo
sudo dnf clean all
sudo dnf update
sudo dnf install binutils gcc make patch libgomp glibc-headers glibc-devel kernel-headers kernel-devel dkms or dnf install binutils gcc make patch libgomp glibc-headers glibc-devel kernel-headers kernel-PAE-devel dkms
dnf install VirtualBox-4.3
VirtualBox虚拟机安装Fedora 22：http://www.linuxdiyf.com/linux/12893.html