http://download.virtualbox.org/virtualbox
yum -y install dkms wget gcc kernel-devel-$(uname -r) wget -nc --tries=0 --continue --server-response --timeout=0 --retry-connrefused "http://download.virtualbox.org/virtualbox/5.2.12/VBoxGuestAdditions_5.2.12.iso" -nv -O "VBoxGuestAdditions_5.2.12.iso" mkdir /media/VBoxGuestAdditions mount -o loop,ro VBoxGuestAdditions_5.2.12.iso /media/VBoxGuestAdditions sh /media/VBoxGuestAdditions/VBoxLinuxAdditions.run rm -f VBoxGuestAdditions_5.2.12.iso umount /media/VBoxGuestAdditions rmdir /media/VBoxGuestAdditions