Originally Posted by praveen24
I have some basic questions --like --when ever any new file system is mounted is it essential that it should be mounted within root file system.
I assume you mean the basic structure starting with "/" (also called "root", but "root" is used in many ways.)
Yes, the kernel is told at boot time what partition/filesystem to use as the starting point (root). Anything that is connected later has to be related to this. There is however a function called "chroot" (change root) which allows you to change it.