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# 1  
Old 06-23-2008
daemons definition

hi there,
can somebody give me a definition for daemons, or example what are they !!
and what the use for?

i've done some research and all what i found is /etc/...
or /usr/bin/...

and i haven't quietly got the concept.

any ideas !!
Thanks.
# 2  
Old 06-23-2008
This may not be 100% correct but I think pretty close and simple, but daemons are programs that continue to run on your system at all time.... like crond is a daemon for crontab... do a ps -ef | grep root on a box and most of those programs running will be daemons..
# 3  
Old 06-23-2008
Ive got output:

root 2 0 0 Jun16 ? 00:00:00 [kthreadd]
root 3 2 0 Jun16 ? 00:00:00 [migration/0]
root 4 2 0 Jun16 ? 00:00:00 [ksoftirqd/0]
root 5 2 0 Jun16 ? 00:00:00 [watchdog/0]
root 6 2 0 Jun16 ? 00:00:01 [events/0]
root 7 2 0 Jun16 ? 00:00:00 [khelper]
root 49 2 0 Jun16 ? 00:00:00 [kblockd/0]
root 50 2 0 Jun16 ? 00:00:00 [kacpid]

root 2359 1 0 Jun16 ? 00:00:00 /usr/sbin/smartd -q never
root 2365 1 0 Jun16 tty2 00:00:00 /sbin/mingetty tty2
root 2366 1 0 Jun16 tty3 00:00:00 /sbin/mingetty tty3
root 2367 1 0 Jun16 tty4 00:00:00 /sbin/mingetty tty4
root 2368 1 0 Jun16 tty5 00:00:00 /sbin/mingetty tty5
root 2369 1 0 Jun16 tty6 00:00:00 /sbin/mingetty tty6


is all of them called daemons or just the ones that running from
/sbin/...
do we call them daemon just for the ones that runs for root or also for users?

Thanks.
# 4  
Old 06-23-2008
The ones with the question marks are the daemons. That is very definition of daemon to the kernel... no controlling tty.
# 5  
Old 06-23-2008
Thanks guys that was really helpful.
# 6  
Old 06-24-2008
check this if you want to read further

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