LINUX CLASSES - INTRODUCTION
Mommy, Where Did Unix Come From?
Sometime in the mid 1960s, a bunch of geeks at AT&T's Bell Labs decided it would be fun to create a new
operating system called Multics. (This was no small task, because computers at the time were about the size
of a football field and two stories high.) Multics fizzled in 1969 when Bell cut the cord, but some of the
geeks continued work on what became known as UNIX; and it became wildly popular inside AT&T.
Since AT&T was not allowed to sell computer software at the time, it gave away UNIX (complete with
source code) to any educational institution. AT&T produced new versions of UNIX called System III and
System V in the early 1980s, but all the while, geeks at the University of California at Berkeley and other
places were busy hacking away on their own versions of Unix based on the AT&T code. Some cross-pollination did occur, but there are still significant differences between the Berkeley (commonly called
BSD Unix) and AT&T flavors. In the early 1990s, AT&T sold UNIX to Novell, which was bought by
Digital Equipment Corporation, which sold it to SCO (Santa Cruz Operation) in 1995. For the next 15 years,
SCO then tried (with little success) to sue just about everyone, claiming that Linux or some variant
of UNIX, or a product based on them, violated their copyright and/or licensing terms. SCO now teeters on
the edge of bankruptcy, after a court ruled in 2010 that Novell is the owner of the UNIX copyrights.
So how does this affect Linux? Much of the legal wrangling was over whether or not snippets of the
original UNIX code found their way into Linux, and if so, was it a legal violation of any sort. Novell
seems to have put this to rest by stating "We don't believe there is Unix in Linux" and pledging
not to sue anyone over UNIX or Linux ownership issues.
Today, there are now lots of Unix variants sold or given away by many different companies and
universities. While these various flavors can make it difficult to write portable software, efforts to
standardize Unix (two of the more notable ones being POSIX and COSE) offer hope for greater
compatibility in the future.
Like any operating system, Unix has some cryptic commands and less-than-intuitive aspects. (Three of the
most important Unix commands have the peculiar names cat, grep, and awk .) Either serious hallucinogens
or a warped sense of humor came into play at some point in the creation of Unix. I don't let this bother me,
though, taking comfort in my favorite platitude: "Unix was written by geeks on drugs." Seriously, though,
Unix is really no more difficult to learn than DOS or Windows--it's just different.
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Comments - most recent first
(Please feel free to answer questions posted by others!)
(31 Mar 2012, 22:15
I've a bunch of questions from your article:
1.what is XWindows?
3.can't understand the line no Unix in Linux?
(17 Mar 2012, 07:09
If Multics fizzled in 1969, can you please tell me why I was forced to
endure using it in the middle eighties while I was studying my Computer
Science degree course!!! :)
(26 Feb 2011, 05:00
hey thanks alot for putting this up. and thanks for the whole not assuming
we are already well versed in the subject before trying to tell us somthing
about it. i love computers and i like to learn its just kina hard to learn
when you cant find a good place to sttart so thanks for that haha :D
Alfred G Mangera
(31 Aug 2010, 03:41
i have learned a lot today
(09 Aug 2010, 11:37
@Roy, I did some updating. Hopefully the legal nonsense is over, but SCO
is not quite dead yet. :-)
(06 Aug 2010, 14:57
Hi Doctor Bob;
I think you need to do a complete re-write of the first two chapters of
this tutorial. You talk about DOS but I don't think anyone, except me, uses
it any more. And SCO, I thought they died a few years ago after trying to
sue everyone and their mothers. They hung around for about 3 or 5 years
after they were declared brain dead.
I welcome your comments. However... I am puzzled by many people
who say "Please send me the Linux tutorial." This website *is* your Linux Tutorial! Read everything here, learn
all you can, ask questions if you like. But don't ask me to send what you already have. :-)
NO SPAM! If you post garbage, it will be deleted, and you will be banned.
by Bob Rankin
All rights reserved - Redistribution is allowed only with permission.