What is diffrance between Linux and unix?

Answer 1

Shell is a program which allows the user to access the computer system. Shell is an interface between the user and computer system.

Kernel is the only way through which the programs (all programs including shell) can access the hardware. Its a layer between the appliation programs and hardware. It is the core of most of the operating systems and manages everything including the communication between the hardware and software.

KERNEL is the core part of operating system. It contain modules like device modules and other modules etc. Kernel is written in C language. Basically kernel is mediator between hardware and Operating System. But SHELL is an interface between users and operating system. Both are mediator but work is totally different.

Let we have an example of "eject" command in Linux operating system:

User give a command to Shell through input device like keyboard and see that command on video Device like monitor, but in actual concept is user give a command to shell, then this shell transfer that command to kernel.when kernel have module of that command then it transfer to hardware like CDROM. After that hardware behave as the module in kernel and then kernel again transfer the output to Shell. And finally shell transfer that output to user.

Hardware <---> Kernel <---> Shell <---> User

Answer 2

The 'shell' is a program that executes under the control of the Unix Operating system.

Answer 3

Unix is trademarked and copyrighted; GNU is not. Also, the GNU project covers a lot more software than just the Unix system.

Answer 4

The short answer is that Unix is an open source operating system, and Linux is a modified Unix that was modified by Linus Torvalds (combining Linus and Unix, or Linux)