Adding a service , script to startup on linux

This small FAQ explain how to make linux start certain service or self made program at the boot time.

Step 1:
Edit /etc/rc.local

This script will hold your personal initialization instructions which will be loaded after all other programs are loaded.

Example:

#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local

/usr/local/apache/bin/apachectl
startsslecho Starting Apache ... Felo

service sendmail start
echo Starting Sendmail

I do hope its usefull , its simple but not everybody knows it right ?