see current kernel version
uname -r 5.4.0-52-generic
see all kernels installed
dpkg -l linux-{image,headers}-"[0-9]*" | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e '[0-9]'Check that we have the latest version. if needed, reboot the machine and recheck step 1.
delete each one except the current. run this repeatedly
# start with linux-image-*-generic apt-get purge linux-image-4.15.0-122-generic # only if no disk space left : dpkg --remove linux-image-4.15.0-122-generic # after we reclean apt-get autoremove --purge
if it fails you can backup /boot & rm images & regenerate images
cp -r /boot/ initramfs/ rm -rf /boot/initrd.img* update-initramfs -c -k all apt-get upgrade
see /boot
ls /boot/initrd.img-*
pour faire un clean parfait supprimer :
rm /boot/config-xxxx-generic rm /boot/System.map-xxxx-generic rm /boot/vmlinuz-xxxx-generic