UNIX ARCHITECTURE

The two major agencies on which UNIX depends are : kernel and shell. The kernel interacts with the hardware of the machine and shell interacts with the user of the machine. The diagram below shows the architecture of UNIX :

KernelThe kernel is the core of operating system. It is the collection of sub-routines written in C language. It is loaded into the memory when the system is booted and interacts directly with the hardware of the system. Kernel manages the system's memory, schedules processes and performs other tasks.

ShellThe shell is the outer part of UNIX operating System. It is a command interpreter that provides the interface between user and kernel. It communicates the command to kernel to perform the required action.

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