What is the difference between Linux and Unix?

Ok so I am curious. What exactly is the difference between Unix and Linux?



I know Linux is only a kernel. What is there in the different Unix system that make them different from Linux? What do the other versions of Unix offer that Linux does not?



If the Linux written by Linus Torvalds is only a kernel, are the Linux modified and offered by Redhat, SUSE or Ubuntu still kernels?



Thanks.What is the difference between Linux and Unix?
ANY operating system uses a kernel to load the machine. This is the basic program required to get it to read hard drive programs, configure the required hardware and produce a user interface. Unix was originally designed for specific architecture and would not run on an IBM style computer, which is what we now recognise as a PC, it was written for a specific and highly complex system to include network use, mostly via dumb terminals. These were basically just a screen with a keyboard. As it developed it became a full networking system very similar to networks we now use. The Linux kernel was developed from Unix to make it possible to use a PC as an economic networked machine without the security and performance issues of MS Windows. Along the way it attracted a lot of developers who have added functions for various desktops, additional services and now many management systems. The difference between the distributions is largely in the choices of such desktops, and in the way each handles management. And where the original system was mostly server oriented, later systems provide priority for workstation use, but still have the server programs available. So that it is easy to make the same kernel run as a workstation, or by turning on the required services, and removing some of the desktop functions make it a very lightweight but powerful server.
Unix is the Grandfather and was originally designed for the government. It had no graphical User Interface, it was all console command. Linux was an off shoot from Unix that made it possible for Graphical User Interface. Even to this day Unix needs something plugged into it to make it user friendly. Several created system have been created to make this possible. Unix is difficult to work with from a computer users point of view and knowledge. Unix is a stable system in general. It is the under laying operating system, enhanced by other operating systems. It is used in the Mac Computer. What does it really offer? In the console command mode it is virtually a Power House that can do a lot of things without a Graphical User Interface. This is the real strength of Unix and Linux.What is the difference between Linux and Unix?
Linux is a UNIX Type System V look-alike, inspired by what Linus saw but no actual AT%26amp;T code (now belongs to SCO I think and someone stupid enough to pepper true UNIX code to get it sued) The other Type is BSD, look-alike represented by FreeBSD.



The difference is what hardware Linux vs. UNIX born in. UNIX was from true mainframe/mini-fridge-like while Linux came from ordinary microcomputer.



Redhat SUSE Ubuntu and all those are VAR, Value-added resellers, they gearheads took kernel-only Linux, pepper it with ready-to-run stuff and pass the stuff to us, either for profit or at-cost.
Redhat, SUSE, and Ubuntu are distributions of Linux, that all use the same Linux kernel, but have different applications, desktop environments, themes, and more.



Linux is a modified kernel based of of UNIX.What is the difference between Linux and Unix?
WHAT LINUX IS http://en.wikipedia.org/wiki/Linux



WHAT UNIX IS http://en.wikipedia.org/wiki/Unix



WHY LINUX IS BETTER http://www.whylinuxisbetter.net/





LUg.
UNIX is just a family of many OS linux is a clone of UNIX but was set-up much better.



Mac is also a UNIX based OS :D