WHAT IS LINUX / UNIX
UNIX is an operating system which was first developed in the 1960s, and has been under constant development ever since. By operating system, we mean the suite of programs which make the computer work. It is a stable, multi-user, multi-tasking system for servers, desktops and laptops.
UNIX systems also have a graphical user interface (GUI) similar to Microsoft Windows which provides an easy to use environment. However, knowledge of UNIX is required for operations which aren't covered by a graphical program, or for when there is no windows interface available, for example, in a telnet session.
Linux is Modern Operating System that runs on almost every modern processor- x86, x86-64, PowerPC, IBM Zseries, SPARC, Alpha, ARM etc.
Popular Linux Distributions are
* Enterprise Grade - Redhat, SUSE, Oracle
* Free / Unsupported – Fedora, openSUSE, Ubutnu, Slackware, BOSS …
HISTORY OF LINUX
1969 Summer 1969 Unix was developed.
1969 Linus Torvalds is born.
1971 First edition of Unix released 11/03/1971.
In 1991, Linux is introduced by Linus Torvalds, a student in Finland. In Helsinki, Linus Torvalds began a project that later became the Linux kernel. It was initially a terminal emulator, which Torvalds used to access the large UNIX servers of the university.
In 2001 Linus Torvalds releases version 2.4 of the Linux Kernel source code on January 4th.
The first release of Ubuntu is released October 20, 2004.