what is the important role of kernel in unix operating system?

Hi Suraj,

The kernel of UNIX is the hub of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to system calls.

As an illustration of the way that the shell and the kernel work together, suppose a user types rm myfile (which has the effect of removing the file myfile).

The shell searches the filestore for the file containing the program rm, and then requests the kernel, through system calls, to execute the program rm on myfile.

When the process rm myfile has finished running, the shell then returns the UNIX prompt % to the user, indicating that it is waiting for further commands.

I think the description wil clear u r doubt...

If any query let me know...

Thanks & Regards,
Riju

kernel is a program in operating system which in initialization the hardware of the computer system and make it available for other program's

In addition to the info from rijus, to get a better understanding one should read a book like "The design of Unix Operating System" - Maurice Bach or "Operating Systems" by Milenkovic or Andrew S.Tanenbaum.

The job of the kernel is to manage all the resources on the System - processor, memory, disk, devices, interrupts, all the data read/write access etc at the least possible expense and at the best possible response and performance.

By the way, this thread should be in the operating systems section & not here....
Hope the moderator takes care of it.