I would like to know what is the role of "Daemon" in linux?
 

I would like to know what is the function of "Daemon" in linux.

A daemon is a Linux/Unix term for what in Windows is called a process.

They run quietly in the background and do stuff behind the scenes.

Wikipedia has a nice article about them:

http://en.wikipedia.org/wiki/Daemon_(computing)

You may also see the word 'service' used eg in RHEL

service network start (or stop or restart)

sounds like a homework question
And i still think that these one line posts by 1 posters ( first post) is a bot

when we start to work on linux many services run on system it called daemon,actually it is a process which works in background silently