Linux: We've shown you how to clean up your messy boot menu in Ubuntu, but if you don't want to remove old kernels entirely, free program Grub Customizer will clean up your boot menu in no time.
Whether you want to keep your old kernels around or just want the quickest way to edit your boot menu, Grub Customizer's simple checklist will clean up your Grub menu in just a few clicks. It also has a few more advanced customisability features in its preferences (like changing the colour of the menu or the order of the items), but its main draw is that no matter what you want to do, its dead simple to use. Ubuntu users can grab it by adding the PPA and installing it using the following Terminal commands:
sudo add-apt-repository ppa:danielrichter2007/grub-customizer sudo apt-get update sudo apt-get install grub-customizer