Defination Of LINUX and UNIX

History of UNIX :

* UNIX is an Operating System (OS).

* UNIX was developed about 40 years ago i.e., 1969 at AT&T Bell Labs by Ken Thompson

and Dennis Ritche.

* It is a Command Line Interpreter. It was developed for the Mini-Computers as a time sharing system.

* UNIX was the predecessor of LINUX.

• UNIX is copyrighted name so it is use by big company.

There are number of other karnel of other system data base on unix.It was relate under the GNU(gnu not unix) .Unix (officially trademarked as UNIX, sometimes also written as Unix) is a multitasking, multi-user computer operating systemThe Unix operating system was first developed in assembly language, but by 1973 had been almost entirely recoded in C, greatly facilitating its further development and porting to other hardware. Unix operating systems are widely used in servers, workstations, and mobile devices.

Some Version Of Uniux:

Version 7 Unix:

Seventh Edition Unix, also called Version 7 Unix, Version 7 or just V7, was an important early release of the Unix operating system . ...

Version 6 Unix:

Sixth Edition Unix, also called Version 6 Unix or just V6, was the first version of the Unix operating system to see wide release outside ...

Xe

nix

Xenix is a version of the Unix operating system , licensed by Microsoft from AT&T in the late 1970s. superseded it with SCO UNIX (now ...

Version 8 Unix:

Eighth Edition Unix, also known as Version 8 Unix or V8, was a version of the Research Unix operating system developed and used internally ...

Version 10 Unix:

Tenth Edition Unix, also known as Version 10 Unix or V10, was the last version of the Research Unix operating system developed and used ...

Version 9 Unix:

Ninth Edition Unix, also known as Version 9 Unix or V9, was a version of the Research Unix operating system developed and used internally ...

UNIX/32V:

UNIX/32V was an early version of the Unix operating system from Bell Laboratories , released in June 1979 . Seventh Edition Unix to the ...

Unix comes with Various files like:

• jfs , gpfs(AIX)
• jfs , gpfs(HP-US)
• jfx , gpfs(SOLORIS)

History of LINUX :

* LINUX was created by Linus Torvalds in 1991 by the help hackers and crackers.

* LINUX is a open source. you can see the source cord and can change them.

• LINUX is a variant of UNIX.

Various Version of Linux:

1.Red hat

• fedora

2.Mendreva

3.Ubuntu

4.Debian

NOTE:Linux Version ubuntu create in every six month.

Linux kernel is heart of Ubuntu OS.kernel is important of any operating system(OS).Kernel Provide bridge between hardware and software.It is an independently clon of unix kernel.This OS can be inspected and improvement can be done as desired.

Open source platform can be tested by computer programmer around the globe.It is not possible in closed system like windows.

Linux has files like :

ext4 , ext5 you can see these in the file system .
Shell:

 The shell is a program that sits on the as an interface between users and kernel. It is a command interpreter and also has programming capability of its own.

 Shell Types:
• Bourne Shell (sh) (First shell by Stephen Bourne)
• C Shell(sh)
• Korn Shell (ksh)
• Bourne Again Shell(bash)

Some remaining difference between unix/linux:

1. UNIX is used in intenet server or big company.

LINUX is mainly used in pc.

2. LINUX is based on kernel of UNIX.
3. Both OS are open source but UNIX closed one as compared to LINUX.