Ubuntu / Debian Linux: Services Configuration Tool to Start / Stop System Services

Your Debian / Ubuntu Linux box security depends upon access to
system services (one of many aspects). For example, you may need to
provide a web server (Apache service) to serve web pages. However, if
you do not need use a service, you should always turn off all unused
services to avoid exploits.

Traditionally, Debian provided various tools to manage services.
There are various methods for managing access to system services:
a) /etc/init.d/service
b) rcconf
c) update-rc.d etc

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