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sudo /etc/init.d/vboxdrv setup
 * Stopping VirtualBox kernel modules                                    [ OK ] 
 * Uninstalling old VirtualBox DKMS kernel modules                       [ OK ] 
 * Trying to register the VirtualBox kernel modules using DKMS                  Error! Your kernel headers for kernel 3.5.0-18-generic cannot be found.
Please install the linux-headers-3.5.0-18-generic package,
or use the --kernelsourcedir option to tell DKMS where it's located

 * Failed, trying without DKMS
 * Recompiling VirtualBox kernel modules                                        
 * Look at /var/log/vbox-install.log to find out what went wrong
  1. sudo /etc/init.d/vboxdrv setup
  2.  * Stopping VirtualBox kernel modules                                    [ OK ] 
  3.  * Uninstalling old VirtualBox DKMS kernel modules                       [ OK ] 
  4.  * Trying to register the VirtualBox kernel modules using DKMS                  Error! Your kernel headers for kernel 3.5.0-18-generic cannot be found.
  5. Please install the linux-headers-3.5.0-18-generic package,
  6. or use the --kernelsourcedir option to tell DKMS where it's located
  7.  
  8.  * Failed, trying without DKMS
  9.  * Recompiling VirtualBox kernel modules                                        
  10.  * Look at /var/log/vbox-install.log to find out what went wrong
  11.  
go to heaven