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Anyway, the other day I had to install a kernel update on my work laptop that is running Xubuntu, and it wouldn't download because I had run out of space in /boot. That's almost always caused from having too many kernel image files saved there from previous updates.
Well I found a really cool one-line command that removes all kernel images except the current one. That command is:
export KERNEL="$(uname -r | grep -Po '([0-9\.\-]*[0-9])?')"; dpkg --get-selections | grep -E "linux-(header|image).*" | grep -iw install | sort | grep -v "$KERNEL" | grep -v "lts" | sed 's/install//g' | xargs dpkg -PYou can put that in a convenient script if you like for future use!