Removing old linux images

gistfile1.txt

*** 1. Remove --no-act for run the commands for real.
*** 2. Find out the range of your kernel version numbers and replace the numbers below. e.g. {start..end}

Finding out versions:
dpkg -l | grep linux-image

Purging the images:
sudo dpkg -P --no-act --force-depends linux-image-3.13.0-{32..46}-generic
sudo dpkg -P --no-act --force-depends linux-image-extra-3.13.0-{32..46}-generic
sudo dpkg -P --no-act --force-depends linux-headers-3.13.0-{32..46}-generic
sudo dpkg -P --no-act --force-depends linux-headers-3.13.0-{32..46}

Cleaning afterwards:
sudo apt-get autoclean