VirtualBox update / kernel update

The VirtualBox GUI usually annoys with information on new versions of the VirtualBox (rpm).

To upgrade VirtualBox, follow the link provided in the message window:

1. http://download.virtualbox.org/virtualbox/4.3.20/ and then get correct rpm and extpack VirtualBox-4.3-4.3.20_96996_el6-1.x86_64.rpm
   Oracle_VM_VirtualBox_Extension_Pack-4.3.20.vbox-extpack 
2. stop all virtual machines
3. upgrade
   

   rpm -Uvh VirtualBox-4.3-4.3.20_96996_el6-1.x86_64.rpm 
   VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.3.20.vbox-extpack 

   (rpm rebuilds the new kernel module and
   extpack installs /usr/share/virtualbox/VBoxGuestAdditions.iso )
4. start virtual machines

When kernel is to be updated then

1. update kernel
2. reboot
3. rebuild kernel modules
   

   /etc/init.d/vboxdrv setup
   /etc/init.d/vboxdrv restart

4. start virtual machines