I'm running Ubuntu 16.04
I can't install the latest updates and the error it's giving me is that /boot is full.
Looking in /boot, I see a lot of the following files:
initrd.img-4.4.0-**xx**-generic
vmlinuz-4.4.0-**xx**-generic
vmlinuz-4.4.0-**xx**-generic.efi.signed
config-4.4.0-**xx**-generic
abi-4.4.0-**xx**-generic
System.map-4.4.0-**xx**-generic
**xx** varies from 21 to 38...
Can I and should I delete anything that's not the latest?