The history of Unix systems and their main components.

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Using more command

Is there any case or reason to use "more" unix command instead of "less". As far as I see "less" is "better" in all senses, so does it mean that "more" is a command which has no reason to be used when ...
543
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2answers
122k views

Why was '~' chosen to represent the home directory?

I have often wondered why the ~ represents the home directory of a user. Is there a reason behind this, or is it just some infrequently used character?
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5answers
857 views

If Mac OS X is UNIX, why is it that it is not open sourced and the license is proprietary?

If Mac OS X is a Unix, as answered in this question, why is it that it is not open sourced and the license is proprietary, as stated in this Wikipedia article? According the the genealogy from this ...
19
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1answer
708 views

What shells were used on early unix systems?

According to wikipedia, the Bourne shell was introduced in 1977 and C shell in 1978, but unix itself dates back to 1969. If you were using a unix system before 1977, what shell would you have been ...
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1answer
323 views

Does CentOS fall into System V family? How is it considered to be while comparing with Unix System V family?

CentOS is "derived entirely from the Red Hat Enterprise Linux (RHEL) distribution" (more here). Does it fall into any UNIX System V family? Such as PDP-11 or etc? If not, where does CentOS stands ...
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1answer
145 views

History of WINE

I will be doing a talk about WINE and how it has changed the situation for new Linux users that come from Windows and how it has matured from the start till know. I have much info already about it and ...
6
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3answers
168 views

Did all of the Requests for Comments directly affect the design of Unix networks?

I want to know more about Linux must be one of my most enduring sentiments. But I often find that I learn the most, or perhaps just feel the most satisfied with what I have learned, when I simply ...
14
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2answers
2k views

Origin of the word cron?

Trying to settle a friendly argument. Is "cron" an acronym for something? Additionally, did it's current canonical name "cron" originate from something shortened for something like chronos or ...
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2answers
606 views

Is it true that the first version of Linux was based on parts of Unix?

Me and a friend had a discussion about Linux and Unix today and my friend kept saying that the first version of the Linux kernel was based on [parts] of the Unix kernel. This really surprised me ...
6
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3answers
403 views

Is `Tru64 UNIX` open source?

Is Tru64 UNIX an open source/free or commercial system? Does it work on 32-bit platform? and what are its features in compare with *BSD & Linux system?
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3answers
990 views

Why the unix bin directory named in that way?

I thought the bin directory is the place for binary files. If so, what about script files? Should they be placed somewhere else? What's the history of bin directory and where should I put script ...
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0answers
140 views

Why Unix is sometimes referred as UN*X or *nix? [duplicate]

Possible Duplicate: Why is there a * When There is Mention of Unix Throughout the Internet? Why Unix is sometimes referred as UN*X or *nix? Asterisk usually means that some letters are ...
4
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1answer
226 views

History of apropos command

I am writing a paper on my project, the goal of which is to write a new implementation of the apropos(1) command. While I realize that apropos was written in the early days of Unix when computing ...
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3answers
10k views

Why does Unix time start at 1970-01-01

Why does Unix time start at 1970-01-01? Why not 1971-01-01 or any other date?
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2answers
247 views

What are all the items on the cover of the “Linux Administration Handbook”?

As I mentioned in What do all the pictures on the front of the "Unix and Linux System Administration Handbook" represent? I'm fairly new to Linux and Unix. @jasonwryan provided an excellent ...
11
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1answer
868 views

What do all the pictures on the front of the “Unix and Linux System Administration Handbook” represent? [duplicate]

I'm a newcomer to Unix and Linux, and I've been trying to get up to speed on everything. One of the guides I've used is the "Unix and Linux System Administration Handbook" It's a pretty great book, ...
12
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2answers
3k views

What are the main differences between BSD- and linux-based operating systems?

I am a long time linux user and have recently become interested in playing about with BSD-based operating systems. What are the differences between linux and BSD-based systems. I am interested in ...
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2answers
433 views

Unix History: return code octal?

// EDIT: Request to move this question to unix.stackexchange.com I was thrown off guard today by gdb: Program exited with code 0146. gdb prints the return code in octal; looking into why I found: ...
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2answers
163 views

What was the paid only period in history of SuSE?

Around version 7.0 (? just guessing) SuSE became paid only distribution (i.e. you had to pay to get the copy), after several releases SuSE came back to free + paid model. Now -- the most important to ...
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4answers
5k views

Single dashes `-` for single-character options, but double dashes `--` for words?

Where did the convention of using single dashes for letters and doubles dashes for words come from and why is continued to be used? For example if I type in ls --help, you see: -a, --all ...
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2answers
7k views

Is `cal` broken? What happened in September 1752?

If you look at the output of cal 9 1752 you will see this strange output: September 1752 S M Tu W Th F S 1 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 The following story ...
9
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3answers
711 views

Why does the “she-bang” begin with a “#!”?

Why does the "she-bang" begin with a #!, like #!/bin/bash? I have always accepted that this how it is done, but is there a reason behind it? Why start with #; isn't that usually a comment? Or is it ...
17
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2answers
4k views

What is a socket?

Could someone explain to me what a socket is? I see it in many acronyms in context of SSL, etc. Also, why is it called a socket? Is it purely because it was what a name they invented? Or was it the ...
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4answers
1k views

How did they manage to drive a Unix computer before mice and copy & paste?

Since Unix is 40 years old, Unix is older than the invention of the computer mouse. (actually only 3 years if Unix is from 1969 and the mouse from 1972) How in the world did a new user do anything ...
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2answers
1k views

What is Unix now?

As I read in Wikipedia, Unix started as a revolutionary operating system written mostly in C allowing it to be ported and used on different hardware. Descendants of Unix is mentioned next, mostly BSD. ...
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1answer
266 views

General questions about OpenBSD source code and release dates

Looking into doing analysis of the lifespan of a line of code, and via another question on stackexchange I was pointed to a research paper on OpenBSD that I've got a few questions about. That being: ...
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3answers
614 views

Why do we need the reboot function in different binaries?

Why do we need the reboot function in different binaries? shutdown -r and reboot Or do they differ in something?
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2answers
255 views

Is there a archive of old man pages? specifically for the features available for grep in early 'ed'

This is just a bit of history rummaging... I'd like to know how different today's grep is to the original implementation, introduced by Ken Thompson in ed. which evolved to ex, which then became vi... ...
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3answers
3k views

What is the point of the 'operator' user?

Many un*x systems ship with a user account named 'operator'. What is the purpose of this account? Do some systems actually make use of this account, or is this more of a historical legacy? Have you ...
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1answer
350 views

What is the difference between UNIX and UNIX Like? [duplicate]

Possible Duplicate: Is Linux a Unix? I have heard Linux was not UNIX (I guess it still isn't) but that it was UNIX Like. Some people will just say "Linux is UNIX" or say "Linux, Solaris, ...
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1answer
483 views

Does research unix have any binary editor?

I cannot find any binary editor in v7 unix by reading volumn 1 of the manual. Is there any?
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2answers
8k views

Why is 'umount' not spelled 'unmount'?

I am wondering if there is any historical or practical reason why the umount command is not unmount.
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2answers
400 views

Why are UNIX logins often formed with the first letter of the first name followed by the first seven letters of the name?

I have seen in many places (especially universities) logins formed in the following way: First letter of the first name: John Smithsonian → j First seven letters of the name: John Smithsonian → ...
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5answers
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Why do /usr and /tmp directories for Linux miss vowels in their spellings?

I have often started to think about this but never found a good answer. Why are these two Unix directories not /user and /temp instead? All the other directories under root seem to be exactly what ...
22
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5answers
2k views

What aspects of Plan 9 have made their way into Unix?

Plan 9 was developed by Bell Labs as a successor to Unix. Although for various reasons it never quite materialized as such, a fair amount of development still went into Plan 9. My question is, what ...
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2answers
2k views

Origin of 'root' account

What's the origin of root account? Where did it come from and why is it called root anyway? (Originally asked by @lizztheblizz on Twitter.)
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2answers
285 views

“Linux supports the dynamic loading of kernel modules. ”

I read in a book written by Robert Love that: Linux supports the dynamic loading of kernel modules. He said this is the difference between Linux and Unix, but I seem to recall there is also KLD ...
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2answers
2k views

Expansion of the word UNIX?

Is UNIX an acronym? What does it stand for?
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3answers
1k views

Who wrote the “Linux kernel” (Linus Torvalds and his team)?

Who are the authors of the pure Linux kernel from scratch, which was integrated with GNU tools and formed the full GNU/Linux Operating system in the 1990s? I have read some wiki articles but I haven't ...
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2answers
13k views

What is the concept behind “tty” in linux?

Where did the terminology "tty" come from in Linux?
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1answer
496 views

What is the difference between shared memory in early unix systems vs modern unix systems?

How could processes share memory in early versions of UNIX version modern implementations of shared memory?
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3answers
853 views

zsync vs. jigdo

What's the difference between zsync and jigdo? Their core functionality seems the same, so I'm curious on things like performance, file size, and ease-of-use. Would also be interesting to know why one ...
4
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1answer
330 views

Why did Debian create the DFSG?

I'm curious why Debian created the DFSG when the FSD already existed. There are some differences (conflicts) of course, but was that the main motivation?
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1answer
728 views

What killed Beagle? [closed]

Beagle was all the rage some years ago, and then it just died... silently. Anyone knows why?
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2answers
329 views

Where is 'kernel panic' used?

Is the name kernel panic being used outside of Linux-based systems?
2
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2answers
378 views

What is the difference between X and XFree?

Why are there two programs for that?
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5answers
27k views

Is Linux a Unix?

So, there are lots of different versions of Unix out there: HP-UX, AIX, BSD, etc. Linux is considered a Unix clone rather than an implementation of Unix. Are all the "real" Unices actual descendants ...
103
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3answers
16k views

What does “rc” in .bashrc stand for?

Is it "resource configuration", by any chance?
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4answers
4k views

Evolution of Operating systems from Unix

Can you explain the evolution hierarchy of operating systems (Linux and Windows) from Unix?
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1answer
700 views

Resources System V vs BSD

I'm searching for some detailed resources about the differences of System V and BSD concepts. For example: Interprocess Communication Sockets vs TLI ... Some sort of pro/cons discussion with ...