modprobe: ERROR: could not insert ‘vboxdrv’: Package not installed

I can’t run any virtual machine. I get this error: WARNING: The character device /dev/vboxdrv does not exist. Please install the virtualbox-dkms package and the appropriate headers, most likely linux-headers-generic. You will not be able to start VMs until this problem is fixed. VBoxManage: error: The virtual machine ‘Ubuntu 14.04’ has terminated unexpectedly during startup…

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