df -h
/dev/sda1 461M 461M 461M 100% /boot
uname -r
> 4.4.0-139-generic
sudo dpkg --list 'linux-image*'|awk '{ if ($1=="ii") print $2}'|grep -v `uname -r`
> linux-image-4.4.0-134-generic
> linux-image-4.4.0-138-generic
> linux-image-4.4.0-141-generic
> linux-image-4.4.0-97-generic
> linux-image-extra-4.4.0-134-generic
> linux-image-extra-4.4.0-138-generic
> linux-image-extra-4.4.0-141-generic
> linux-image-generic
sudo rm -rf /boot/*-4.4.0-{97,134,138}-*
sudo apt-get -f install -y
sudo apt-get autoremove -y
sudo update-grub && sudo apt-get update
df -h
/dev/sda1 461M 227M 211M 52% /boot
