History of Linux

***Linux ***

I am writing here brief introduction about Linux.

Features of Linux:
Open Source
Multitasking
Multi user
Portable: Can match with any hardware
Scalability: Can be used for any purpose.
Reliability
Inbuilt Firewall (iptable)


Now we will move to History of Unix.

In 1960’s scientist in AT&T lab named Ken Thomson has created 1st operating system known as Multics. This was built in purely in Assembly language. Its full form is Multiplexing Information & Computing System.
Drawbacks of system were that it was Machine dependent i.e. for each separate p.c. you have treat as different machine & different commands different settings etc.
So this went fail.
After 9 years in 1969 Ken Thomson met founder of C language Denis’s Ritchie
& they combinely created a new O.S. named UNICS (UNIPLEXING INFORMATION & COMPUTING SYSTEM) which was built 80% in C & 20% in Assembly lang.
After few days it was named as UNIX (100% C language).

After creating a O.S Ken Thomson started to giving lectures in universities. Students learnt UNIX & started to develop it. Some of vendors to use UNIX as base are




Vendors --------O.S


AT & T, Bell Labs------- Sys 3 sys 5


Sun ------Sun OS- Solaris


IBM------ AIX


SG ------IRIX


SCO ------SCO UNIX


BSD ------Free BSD LINUX



As these companies were started to dominate the computer world rest all company venders came together & formed Open Source foundation.

In 1990’s an under graduate student named LINUS TORVALDS from University of Helsinky designed UNIX like kernel on 386 Intel machine & gave this to Open Source Community. Linux kernel was bundled with many softwares from various distributors & it gave rise to many flavors of LINUX.

: LINUX DISTRIBUTORS:


Linux distributors are


1. Red Hat
2. Suse Linux
3. Mandriva Linux
4. Ubuntu
5. debian
6. Turbo Linux
7. Slackware Linux
8. Puppy Linux

In these most popular is red hat Linux.
Versions of Red Hat Linux.

Free Version -------------Commercial Editions
Red Hat 1 to Red Hat 9 --------



Fedora Core 1 -------------- RHEL 1


Fedora Core 2------------- -RHEL 2


Fedora Core 3-------------- RHEL 3


Fedora Core 4 --------------RHEL 3


Fedora Core 5 --------------RHEL 4


Fedora Core 6 --------------RHEL 5 beta

Free versions are freely distributed all over the world. But they dont have any support from Red Hat. In RHEL they give full support to their clients.