etc/init.d vs /etc/event.d

Most of the files in the /etc/rcn.d and /etc/init.d directories will go away Ubuntu emulates runlevels using Upstart to aid migration and provide compatibility with software for other distributions. This section explains how init scripts work with (emulated) runlevels to control system services. The /etc/rcn.d and the /etc/init.d directories described in this section will largely be empty by the release of Ubuntu Gutsy+2 (the second Ubuntu release following Gutsy), the links in these directories having been replaced by job control files in /etc/event.d