10-25-2013
I believe PWB/UNIX was based on Version 7 (not version 1-4). If it wasn't based on V7, it certainly had significant input from V7.
SunOS 4 was not a dead end (as shown n the diagram). Solaris 2.0 (not shown in the diagram) was the result of a grand merge of SunOS 4 and UNIX System V Release 4. SunOS 4.1 (also not shown in the diagram) also contained significant input from UNIX SVR4 and was a major step towards Solaris 2.0 (containing SunOS 5.0), but /bin and /usr/bin utilities in SunOS 4.1 were still BSD based (with some SVR4 extensions) while /bin and /usr/bin utilities in Solaris 2.0/SunOS 5.0 were SVR4 based with BSD extensions.
Some BSD 4.4 features were also merged into SunOS 4.1 and Solaris 2.x, but that is not shown in the diagram.
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Link describe the Step by step formation of Unix
http://perso.wanadoo.fr/levenez/unix/
Also:
- History
- Author of First Unix C Language
- Unix Family research Tree
- BSD and Sun History chart
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Hi. I am new here, and this is my first post at the UNIX.com forums. I have read the book Fire in the Valley: The Making of the Personal Computer, and I noticed that neither UNIX nor Linux was mentioned once in the book. Why is this? What was UNIX's place in the early days of personal computers?
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4. Shell Programming and Scripting
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6. UNIX and Linux Applications
Hi everybody Im Megadrink!!!
This is my first thred.
Ive recently been introduced to Unix and i was interested in Unix's History. Can anyone give me a breif History On Unix. Just when it was invented/released. Maybe someother cool things about it.
Thx for the information in advance!! :D (2 Replies)
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Hi guys.
I'm going to buy TCP/IP Illustrated series(3 Volumes). But I saw that these books are very outdated. But reviews at amazon says that these books are awesome.
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hello
is there a family tree, or words that would illustrate the family tree of,
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I am not sure whether it is bash_history.sh (1 Reply)
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I am pleased to announce this new video in 1080 HD for UNIX lovers honoring thirty years of UNIX history spanning from 1969 to 1999 presented in 150 seconds (two and a half minutes) in 1080 HD, celebrating the 50th anniversary of UNIX.
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sh(1) General Commands Manual sh(1)
NAME
sh - Shell, the standard command language interpreter
DESCRIPTION
[Tru64 UNIX] Tru64 UNIX provides two command interpreters with the name sh. The XCU5.0 and POSIX.2 compliant command interpreter sh is
available in the file /usr/bin/posix/sh and is described in the sh(1p) reference page. The Bourne shell, historically known as sh, is
available in the file /usr/bin/sh and is described in the sh(1b) reference page.
[Tru64 UNIX] Your initial, or login, shell is determined by your entry in the file /etc/passwd. This file can be changed only by your sys-
tem administrator. You must use whatever procedures are in place at your location to have this entry changed.
[Tru64 UNIX] If available on your system, you may use the passwd -s or the chsh commands to change your login shell.
Note
This option is not available if your site manages passwords through the Network Information Service (NIS) facility. Check with your system
administrator.
[Tru64 UNIX] Subsequent shells spawned from the initial shell depend on the value in the environment variable BIN_SH. If this variable is
set to xpg4, the POSIX shell is started. If this variable is set to svr4, an SVR4 compliant version of the shell is started. If this vari-
able is unset, the Bourne shell is started. If this variable is set to any other value, an error is reported and the results are unpre-
dictable. See the EXAMPLES section for information on setting this variable.
NOTES
[Tru64 UNIX] With Tru64 UNIX Version 4.0 the Korn shell, /usr/bin/ksh is the same as the POSIX shell /usr/bin/posix/sh.
RESTRICTIONS
[Tru64 UNIX] The file /etc/shells must include entries for both the POSIX shell /usr/bin/posix/sh and the Bourne shell, /usr/bin/sh. If
this file is incorrect, see your system administrator.
EXAMPLES
Using the Bourne, Korn, or POSIX shell, to set the variable BIN_SH to use the POSIX/ XCU5.0compliant shell, enter: BIN_SH=xpg4 export
BIN_SH Using the Bourne, Korn, or POSIX shell, to set the variable BIN_SH to use the SVR4 compliant shell, enter: BIN_SH=svr4 export BIN_SH
Using the Bourne, Korn, or POSIX shell, to unset the variable BIN_SH, enter: unset BIN_SH Using the C/ shell, to set the variable BIN_SH to
use the POSIX/XCU5.0 compliant shell, enter: setenv BIN_SH xpg4 Using the C/ shell, to set the variable BIN_SH to use the SVR4 compliant
shell, enter: setenv BIN_SH svr4 Using the C/ shell, to unset the variable BIN_SH, enter: unsetenv BIN_SH
FILES
User profile. Contains user information, including the login shell name. Contains the names of available and permitted shells.
SEE ALSO
Commands: csh(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p), passwd(1)
Files: passwd(4), shells(4)
Standards: standards(5)
sh(1)