9.5 Can I safely de-install an old kernel package, and if so, how?
kernel-image-NNN.prerm script checks to see
whether the kernel you are currently running is the same as the kernel you are
trying to de-install. Therefore you can remove unwanted kernel image packages
using this command:
dpkg --purge --force-remove-essential kernel-image-NNN
(replace NNN with your kernel version and revision number, of