History of Unix

Back

Multics Projects

1. It was started in 1965 on main frame GE645 by the joint effect of :-
   1. AT&T Bell Laboratories.
   2. General Electrical.
   3. MIT (Massachusetts Institute of Technology).
2. Multics was in return in assembly language.
3. In 1969 Multics projects was dropped.
4. In 1969 KemThanh son & Dennis Ritchie at bell Labs - AT&T redesigned the Multics and introduced new operating system – UNICS (Uniplexed Information & Computing System).
5. It is written in 80% of C language and 20% assembly language.
6. Later on totally written in C language and named as UNIX in 1973.

Flavors of UNIX

Vendor	O/S
AT&T, bell Labs	SYS III, SYS V
SUN	SUN OS – Solaris
IBM	AIX
SG	IRIX
SCO	SCO UNIX
BSD	Free BSD Linux
HP	HPUX

History of Linux

1. In 1990 Linux Torvalds, A graduate student from university of Helsinki designed UNIX like kernel on 386 Intel machine and gave this to OSF (Open Software Foundation).
2. Linux kernel was bundled with many software from various distributed and it gave rise to many flavors of Linux.

Features of Linux

1. Open Source – Free
2. Multitasking
3. Multiuser
4. Portable
5. Scalability
6. Reliability – Biggest server on this planet running Linux without single second of down time last ten years.
7. Security – Inbuilt firewall (IPtables).