C Shell Command Line

This section provides a quick introduction of C shell command line.

The C shell is really a command line interface that takes a command line entered by the user on the standard input, execute the command, and returns command result on the standard output.

A command line consists of a list of strings or words. The first word is called the command name. Other words of the command line are called command arguments.

A number of interesting features are supported on the C shell command line. Those features are applied in the following order before the command line gets executed:

After a command line is passed through above substitutions, it will be executed in different ways based on the command name, the first word of the command line:

Examples of C shell command lines:

%set java home=/usr/local/lib/jdk1.1.1

%/bin/echo $java home
/usr/local/lib/jdk1.1.1

%/echo $java home
/usr/local/lib/jdk1.1.1

%who
herong     tty1     Jul 21 21:36
tom        tty2     Jul 21 18:15

%dothis
dothis: Command not found.

Table of Contents

 About This Book

 1957 - FORTRAN Language Developed by IBM

 1970 - UNIX Operating System Developed by AT&T Bell Labs

 1971 - FTP Protocol Created by Abhay Bhushan

 1972 - C Language Developed by Dennis Ritchie

 1976 - vi Text Editor Developed by Bill Joy

 1977 - Apple II Designed by Steve Jobs and Steve Wozniak

 1977 - The Bourne Shell Developed by Stephen Bourne

1978 - The C Shell Developed by Bill Joy

 What Is the C Shell?

C Shell Command Line

 Command Line History Substitution

 Command Line Alias Substitution

 Command Line Input and Output Redirection

 Command Line Variable Substitution

 C Shell Command Line Examples

 ".cshrc" - C Shell Script File and

 1978 - Bash (Bourne-Again Shell) Developed by Brian Fox

 1979 - The Tcsh (TENEX C Shell) Developed by Ken Greer

 1983 - "Sendmail" Mail Transfer Agent Developed by Eric Allman

 1984 - Macintosh Developed by Apple Inc.

 1984 - X Window System Developed a MIT Team

 1991 - WWW (World Wide Web) Developed by Tim Berners-Lee

 1991 - Gopher Protocol Created by a University of Minnesota Team

 1995 - Java Language Developed by Sun Microsystems

 1995 - PHP: Hypertext Preprocessor Created by Rasmus Lerdorf

 2002 - .NET Framework Developed by Microsoft

 References

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