Purge /boot of old kernels.
Because it is really annoying when /boot fills up from normal apt-get upgrade activity. Since I do not typically compile my own kernels and keep these around, I wanted a tool that would safely purge Ubuntu/Debian kernels automatically. Finding none, I wrote this.
git clone https://github.com/erichs/bootnukem.git
cd bootnukem
sudo ./install.sh
On a build machine or VM, clone this repo and run ./build_deb.sh. This will generate a binary .deb file that may be distributed and installed with dpkg -i on your target hosts.
Purge all kernels older than the current, running kernel:
$ sudo bootnukem
Purge all kernels except the current, running kernel:
$ sudo bootnukem --scorch
Initial work based on this AskUbuntu post.