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Topic: Unix shell


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  UNIX shell differences and how to change your shell (Monthly Posting)
A brief history of UNIX shells Note, this history is just known to be slightly out of historical order, it is in the process of being corrected, but for the moment should be taken with a pinch of salt In the near beginning there was the Bourne shell /bin/sh (written by S. Bourne).
Into this shell they put several concepts which were new, (the majority of these being job control and aliasing) and managed to produce a shell that was much better for interactive use.
Like the Korn shell bash was based upon the Bourne shells language and like the Korn shell, it also pinched features from the C shell and other operating systems (in my opinion it put them together better; guess which shell I use), but unlike the Korn shell it is free.
www.faqs.org /faqs/unix-faq/shell/shell-differences   (2225 words)

  
 Unix Shell Books : Learn Unix Shell with books, documentation, e-books, and technical books
Korn Shell Programming by Example is a straight-forward, nuts and bolts book that will become a standard in the libraries of Unix administrators everywhere because of its real-life examples, progressive style, and lack of unnecessary fluff.
Based on the Korn shell, it is an essential reference for administrators on how to program their system, and it is also beneficial for those new to Unix who need to know how to automate their system.
Learning the Korn Shell is the key to gaining control of the Korn shell and becoming adept at using it as an interactive command and scripting language.
www.bigwebmaster.com /Unix_Shell/Books   (1359 words)

  
 Unix Shell Resources : Unix shell scripts, programs, applications, code, books, tutorials, programmers, and jobs
Many of the explanations in The Korn Shell are clear and crisp, and are quite understandable if you have had any previouis experience working with shells.
A UNIX Shell Object is a unique piece of code that is written with the UNIX Shell using modern object-oriented approaches that make the code more powerful and easier to use over a network or the Web.
UNIX Shell Programming, Fourth Edition gives you: Practical guidance on how to create CGI scripts, object warehouses, and reuse catalogs; Everything on shell extensions for management of distributed environments; A special shell reference appendix containing real-life examples that you can use right now.
www.bigwebmaster.com /Unix_Shell   (1395 words)

  
 HNS - Unix Shell Scripting Malware
Unix shell scripting is very powerful too; it may control program configuration and start/kill services.
Unix systems have a wide range of protection techniques, so, in addition to this file checking, a virus should investigate the target file's permissions - for example, determine whether these are set to read (-r-), write (-w-) and/or executable (-x-).
Unix shell script viruses are relatively easy to create, yet powerful enough to create big problems.
www.net-security.org /virus_news.php?id=55   (2340 words)

  
 Unix Shell Programming
If you set your own command prompt string via a shell startup script, it is advisable to append the shell's default prompt symbol to the end of the string as a visual reference for which shell is active, since each shell has its own characteristics.
It is important to remember that the shell is a program that accepts lines of ASCII text one at a time and interprets them, whether entered one by one from the command prompt or one by one from a script file.
Shell scripts are often used to capture in simpler syntax the result of something hard to remember.
www.unf.edu /cocse/cis/CIShtml/CISUnixShellProg.html   (3373 words)

  
  The Unix Shell for vfx artists - Page 3 - Mel Scripting for Maya
Unix gives you quite a lot of control over the processes that are currently running on your machine (provided you have permission to mess with them - usually only your own processes).
Although most of the standard unix commands are very short, some other commands or scripts you run might be longer, or perhaps you want to always run a certain command with some extra flags instead of its default behaviour.
Because everything is entered as text, the shell needs to know which part of the text is the command being run, and where each one of the arguments to that command starts and finishes.
www.highend3d.com /maya/tutorials/scripting/mel/295-3.html   (3513 words)

  
 Unix Shell   (Site not responding. Last check: 2007-10-07)
The shell program provides an interface between you and the Unix kernel program, which is the heart of the operating system.
Unix currently supports several different types of shells, the most common being the Bourne shell and the C shell.
Because the C shell is the default shell on the RS/6000 Complex and is preferred by most users, this guide will describe features of the C shell.
tis.tulane.edu /How_To/Unix_System/Unix_Shell.cfm   (267 words)

  
 hp unix
Unix file comparison, unix jobs unix ftp script unix system administration unix scripting tutorial tcpdump unix unix made easy unix tutorials, tcpdump unix unix operating system tcpdump unix unix products unix commands list unix guru tcpdump unix unix solaris unix system administrator unix tar command.
Unix webhosting unix solaris unix data recovery unix scripting tutorial unix shell programming unix course unix file comparison history of unix, unix made easy.
Unix webhosting unix solaris unix data recovery unix scripting tutorial unix shell programming unix course unix file comparison history of unix, unix made easy.
www.mhhe.com /socscience/spain/quetal/discussion/messages/22619.html   (397 words)

  
 An Introduction to the Unix Shell
It is generally true of a shell procedure that it may not modify the state of its caller without explicit request on the part of the caller.
The shell is a macro processor that provides parameter substitution, command substitution and file name generation for the arguments to commands.
An interactive shell is one whose input and output are connected to a terminal (as determined by gtty (2)).
partmaps.org /era/unix/shell.html   (6333 words)

  
 UNIX Shell Skills « WordPress Codex
Many WordPress users may not be familiar with using the shell to manage their file systems.
The shell offered by your web host is likely to be bash, which stands for "Bourne Again Shell" after Stephen Bourne who wrote the original modern Unix shell.
These commands are identical to their bash shell counterparts: change the current directory, make a new directory, and list the contents of the current directory.
codex.wordpress.org /UNIX_Shell_Skills   (1845 words)

  
 Unix Shell - Game Host - E-mail
Unix Shell Accounts - Your Internet Home Base
Secondary shell accounts are available as an adjunct to a primary account registered to a customer at the same physical location and telephone number.
Secondary shell accounts provide an additional e-mail box, which may be accessed via pop3, imapd, webmail, or shell mail programs, and web space for additional family members or employees in the same physical location.
www.eskimo.com /services/shells.html   (602 words)

  
 Unix Shell Scripts
In previous discussions we have talked about many of the facilities of the C shell, such as command aliasing, job control, etc. In addition, any collection of csh commands may be stored in a file, and csh can be invoked to execute the commands in that file.
In Unix there are several shells that can be used, the C shell (csh and its extension, the T C shell tcsh), the Bourne Shell (sh and its extensions the Bourne Again Shell bash and the highly programmable Korn shell ksh) being the more commonly used.
Values of shell variable are all character-based: A value is formally defined to be a list of zero or more elements, and an element is formally defined to be a character string.
heather.cs.ucdavis.edu /~matloff/UnixAndC/Unix/CShellII.html   (1371 words)

  
 LINUX & UNIX Shell Programming | Linux Journal
Tansley is writing for the true beginner to UNIX and so is first providing background and command information that will be needed when the user actually begins writing scripts.
He is covering the basic or Bourne shell, which is common to all UNIX flavors including Linux, so scripts will be portable.
While this was a bit disappointing for me, it won't be for someone who has not worked with UNIX for as long as I have.
www.linuxjournal.com /article/3968   (703 words)

  
 UNIX Shell Scripting
Otherwise, the shell would have to wait for the user to type the next command, and the user would have to wait for each command to complete before starting to type.
A shell is a program that runs on most UNIX systems to provide a convenient interface to the operating system and file system.
In Unix the shell is a program which prompts the user and directs the operating system to do what the user wants.
www.cs.wisc.edu /~deppeler/tutorials/scripting   (1986 words)

  
 UNIX shell differences and how to change your shell
The UNIX shell is most people's main access to the UNIX operating system and as such any improvement to it can result in considerably more effective use of the system, and may even allow you to do things you couldn't do before.
The Korn shell became part of System V but had one major problem; unlike the rest of the UNIX shells it wasn't free, you had to pay AT&T for it.
The Bourne shell, the C-Shell and the Korn Shell (if you have it) are all distributed as standard with your UNIX operating system, information on these should come with your operating system, bug reports etc should be sent to your operating system vendor.
www.softlab.ntua.gr /facilities/documentation/unix/shelldiff.html   (1930 words)

  
 What UNIX Shell Are You Using?
The shell takes care of finding your commands in the proper directory, maintaining your custom environment, interpreting command-line wildcards, and maintaining a history of your commands for editing and recall.
One of the UNIX's strengths is that the operating system is not tied to a particular shell.
Most UNIX systems know of at least three shells: the Bourne shell (sh), the Korn shell (ksh, the default login shell on tigger), and the C shell (csh).
www.uic.edu /depts/adn/infwww/html/acccnews/adn04/third.html   (381 words)

  
 The UNIX Shell   (Site not responding. Last check: 2007-10-07)
The shell is your interface with the UNIX system, the middleman between you and the kernel.
The shell recognizes a limited set of commands, and you must give commands to the shell in a way that it understands: Each shell command consists of a command name, followed by command options (if any are desired) and command arguments (if any are desired).
Unlike DOS, the UNIX shell is case-sensitive, meaning that an uppercase letter is not equivalent to the same lower case letter (i.e., "A" is not equal to "a").
snap.nlc.dcccd.edu /learn/idaho/shell.html   (639 words)

  
 Chris F.A. Johnson's Unix Shell Scripting   (Site not responding. Last check: 2007-10-07)
The shell referred to in these pages is always a Bourne-type shell; that is, a shell whose syntax is based on
A POSIX shell is a Bourne shell with a number of extensions (which are mostly derived from the Korn Shell).
Some will run in a Bourne shell, and those that will not should not be hard to convert (in the unlikely event that you find it necessary).
cfaj.freeshell.org /shell   (404 words)

  
 UNIX Shell Script Tutorials & Reference
The UNIX man pages contain almost twice as much information for the C Shell as the pages for the Bourne shell, leading most users to believe that it is twice as good.
A shell script, in its most basic form, is simply a collection of operating system commands put into a text file in the order they are needed for execution.
UNIX will attempt to execute the file in the current shell, and try to process the included command strings within the file using the syntax rules of the current shell.
www.injunea.demon.co.uk /pages/page203.htm   (1618 words)

  
 UNIX shell commands   (Site not responding. Last check: 2007-10-07)
You can also insert the output of a UNIX command into the file you that are editing.
You can start a shell from within vi and use it as you would your usual UNIX environment, then exit the shell and return to vi.
For example, this facility would be very useful if you were using vi to document a UNIX command and you wanted to include examples of the output from this command.
www.isi.edu /div3/helpdesk/UNIXhelp1.3/Pages/vi/unix.html   (153 words)

  
 What is shell? - A Word Definition From the Webopedia Computer Dictionary
For example, if the application is usually command driven, the shell might be a menu-driven system that translates the user's selections into the appropriate commands.
The shell, therefore, is the part of the command processor that accepts commands.
UNIX systems offer a choice between several different shells, the most popular being the Cshell, the Bourne shell, and the Korn shell.
www.webopedia.com /TERM/s/shell.html   (364 words)

  
 Working With the Unix Shell
Unix is an operating system that controls the computer and your interaction with it.
Once you enter a command, the shell interprets it and is responsible for its execution.
Most Unix commands receive input from what is called "standard input" and send output to "standard output".
www.washington.edu /computing/unix/startdoc/shell.html   (861 words)

  
 oreilly.com -- Online Catalog: Classic Shell Scripting
Shell scripting is essential for Unix users and system administrators-a way to quickly harness and customize the full power of any Unix system.
Writing shell scripts requires more than just a knowledge of the shell language, it also requires familiarity with the individual Unix programs: why each one is there, how to use them by themselves, and in combination with the other programs.
The ability to program and customize the shell quickly, reliably, and portably to get the best out of any individual system is an important skill for anyone operating and maintaining Unix or Linux systems.
www.oreilly.com /catalog/shellsrptg   (1722 words)

  
 The Unix Shell for vfx artists - Page 2 - Mel Scripting for Maya
Diffing is pretty handy when you have one thing that you know works, and one that doesn't, and you want to see what the difference is (for example, an ascii RIB file that renders correctly and one that produces a fl frame).
There are two types of editors: those that run within the shell, and those that bring up a new window and can be used with the mouse.
Because we want the wildcard pattern to be passed through to the command, rather than being expanded in the shell and passed through as multiple filenames we wrap it in single or double quote characters.
www.highend3d.com /maya/tutorials/scripting/mel/295-2.html   (2164 words)

  
 Shell Programming UNIX Shell Programming UNIX Shell Programming Part 1: Bourne Shell (Bash) Training available online ...
This is the first course in a three part series that presents students with both theoretical and practical instruction on the origins and basic features of UNIX Shell Programming.
This course will provide an introduction to UNIX shells in general however it will focus on programming in the Bourne shell.
The intended audience for this course are programmers working in a UNIX environment.
www.training-classes.com /course_hierarchy/courses/3022_UNIX_Shell_Programming_Part_1_Bourne_Shell_Bash_.php   (415 words)

  
 Unix Shell Patterns
Shell has emerged as a family of programming languages for the UNIX Operating System in the same sense that JobControlLanguage emerged as a programming language for mainframe job control in the 1960s.
It is a family of languages because we find variant syntaxes and capabilities in the Bourne shell, the Korn shell, the C shell, and others.
A Shell running in a process that is a child process of some parent process, also running a shell, often arranged so the two Shells can communicate through a pipe.
www.c2.com /cgi/wiki?UnixShellPatterns   (546 words)

  
 O'Reilly - Safari Books Online - 0672324903 - Unix┬« Shell Programming, Third Edition
Unix Shell Programming is a tutorial aimed at helping Unix and Linux users get optimal performance out of their operating out of their operating system.
The vast majority of Unix users utilize the Korn shell or some variant of the Bourne shell, such as bash.
It is this quarter's UNIX / Linux textbook (Shell Scripting although it also covers the basic commands) This book is highly reccomended for the Linux beginner or for someone who wants a very good reference book.
safari.oreilly.com /0672324903?suggested=top   (612 words)

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