Ubuntu Geek posted a tutorial about seeing which system services are enable or disable in Ubuntu 11.04
Chkconfig is a utility to update and query runlevel information for system services. Chkconfig manipulates the numerous symbolic links in /etc/init.d/, to relieve system administrators of some of the drudgery of manually editing the symbolic links.How to see system services are enable or disable in Ubuntu 11.04
In Debian, there are several tools with similar functionality, but users coming from other Linux distributions will find the tools in this package more familiar.
