[linux-help] understanding daemons

[Nathan <ncozzens@xxxxxxxxxxx>]

I'm trying to better understand daemons and how they 
work with Linux.  I just finished setting up a DHCP 
server on my 486 Linux box.  I got everything setup to 
go (/etc/init.d/dhcp, dhcpd.conf & dhcp.leases)  The 
man pages said I had to "invoke" the daemon, but I 
didn't know how to "invoke" anything.  I thought maybe 
I could set the ball in motion by rebooting 
instead...but that didn't work.  I finally learned to 
invoke the daemon by typing "dhcpd start eth0".  At 
that point, I was wondering if the daemon would still 
be running after a reboot or if I'd have to invoke it 
every time I started the machine.  The daemon was 
running after a reboot.  I don't understand why the 
reboot didn't work.  The dhcp file in init.d is what 
causes dhcp to start during a boot, right?  So why 
didn't that work when the daemon hadn't yet been 
invoked?  I thought a "dhcpd start" was nothing more 
than a manual way to do what's done automatically 
during a boot.
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