1. uname -r
  2. dpkg -S vmlinuz
  3. dpkg -l “3.13.0-40 grep ^ii
  4. sudo apt-get purge linux-headers-3.13.0-43 linux-headers-3.13.0-43-generic linux-image-3.13.0-43-generic linux-image-extra-3.13.0-43-generic
  5. du -sh /boot