I tried to use this tutorial to make scroll switch work on my Microsoft Natural Ergonomic Keyboard 4000. But I face following error: sudo: /lib/udev/keymap: command not found I have udev version 204-5ubuntu20.2 (the version found in Trusty) I noticed that this version doesn't include keymap tool. But I notices that greater udev versions (which available for Debian, for example) include this tool. Could somebody explain this diff for me? =) And what should I do in this case - install package from Debian repo?