Purge unused Ubuntu linux kernels

A simple, one line command to delete (purge) old, unused Ubuntu linux kernels, & update your grub start-up menu. Tested on Ubuntu 10.04.3 LTS (Lucid Lynx).

Code:

sudo dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | xargs sudo apt-get -y purge

Use at your own risk, no responsibility taken, this might break your machine, etcetera, etcetera.