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奥宝GENESIS 2000培训教材---英文版
- Prepared by: Y.S. Chiu Date : 8 May, 2000 Page 1 of 33 C-Shell Script Training Table of Content 1.0 Introduction of C-Shell 1.1 History 1.2 The User Environment 1.3 History Command 2.0 Metacharacters 2.1 Command line Metacharacters (; |, ()) 2.2 Filename Metacharacters 2.3 Input/Output Metacharacters (redirection) 2.4 Variable Metacharacter ($) 3.0 Aliases 3.1 unalias 4.0 Shell Variables 4.1 Local Variables (set) 4.2 Environment Variables (setenv) 4.3 Built-In Shell Variables 4.4 Numeric Shell Variable (@) 5.0 File Commands and Permissions 6.0 Programming C-Shell 6.1 Looping Commands 6.2 Conditional Commands 7.0 GENESIS 2000 relationship with C-Shell 7.1 Linemode Commands 7.2 GENESIS Variables 7.3 The info Command 7.4 The DO_INFO shortcut 7.5 Hooks 7.6 dbutil 7.7 Script Debuger 7.8 Script Interface Commands 7.9 The gui Application 8.0 Assignments and Final Project 9.0 Reference - Prepared by: Y.S. Chiu Date : 8 May, 2000 Page 2 of 33 1.0 Introduction to C-Shell 1.1 History When UNIX was first written and put to use at ATT Bell Labs in the early 70s, it came standard with one shell. This shell is name the Bourne Shell, after its author Stephen Bourne This shell is still being distributed with every version of UNIX today. In 1978, a copy of UNIX was given to the Computer Science Department at the University of California Berkeley. Under the contract from an agency of the United States Government, the students and faculty developed the first 32-bit virtual memory version of UNIX. As part of that effort a new command shell, dubbed the C Shell, was written. The new shell provided a number of features that were not available with the Bourne Shell. The new functionality added to the C-Shell was designed to benefit the interactive user. Two important additions were the history mechanism, allowing the user to reuse and modify previously executed commands; and job control, which provided for more control over tasks initiated by the user. The third change made with the C-She
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