[xubuntu-users] "Not enough space on disk /boot"

[Ralf Mardorf]

If I were the OP I would run another Linux (multi-boot or live media)
and then copy the /boot directory from the separated partition to the
root partition and comment out the /boot entry in /etc/fstab. In
addition I would tidy up /boot by removing kernels. As already pointed
out, I would purge remove the unneeded kernel packages and also run dkms
remove and after that still check /lib/modules.