No HDD space left for ubuntu update, make some space at /boot
your hd is full, make space in /boot
aaaa
make a
cd /boot ls -la
so you see the `/boot` folder
now delete the stuff you don’t need anymore:
sudo aptitude remove linux-image-3.13.0-49-generic
sudo apt-get remove ...
(ls -la after deleting the linux kernel image)