I recently re-discovered sysv-rc-conf. sysv-rc-conf is a lovely interface to view the runlevels of services in the the /etc/init.d/ directory via ncurses.
sysv-rc-conf is available in the Ubuntu and Debian repos, but sadly not available for openSUSE:
apt-get install sysv-rc-conf
Debian, as well as most of the distributions based on it, like early Ubuntu, does not make any distinction between runlevels 2 to 5.
|2–5||Full Multi-User with console logins and display manager if installed|