610 - Shell Programming for System Administrators
Table of Contents
Course Overview
Hands-on knowledge of the Bourne or Korn Shell is an essential component
of expertise in using and administering UNIX systems. Now you can learn
how to use and program the Bourne or Korn Shell through lectures, demonstrations,
and hands-on labs in this comprehensive course from SCO.
This course is designed for system administrators who wish to achieve
the highest performance standards for maintaining and enhancing their SCO
OpenServer systems. The course is invaluable for any user who wants to
use the full power of the shell to execute commands on the system.
All of the material in this couse applies equally well to both the Bourne
and Korn shells. Students may use either the Bourne or Korn shells in class.
Topics include details of command execution, using variables in shell
scripts, writing program code that uses flow control constructs, and signal
handling. All the knowledge and hands-on skills you need to put the Bourne
or Korn Shell to work is included in this course package.
Course Objectives
By the end of the course, students will be able to:
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Identify and use the basic command line features of the Bourne or Korn
shell
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Identify and execute the different command types on the system
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Write a basic "batch-file" shell script
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Use shell variables in a shell script
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Use quotes to protect shell metacharacters in a shell script
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Conditionally execute lines of code in a shell script
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Use looping statements to repeatedly execute lines of code in a shell script
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Write shell functions for use within a shell script
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Handle signals when they are received in your shell scripts
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Identify efficiency considerations for a shell script
Prerequisites
Students must have mastered the content of the following course before
attending this course:
210 - Introduction to SCO UNIX Systems
Course Series
This course is often taken as part of the following course sequence:
241 - SCO OpenServer Release 5 Administration I:
User Services
325 - SCO OpenServer Release 5 Network Administration
610 - Shell Programming for System Administrators
Course Topics
Shell Overview
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UNIX System Architecture
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Command Line Interpreter
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Filename Expansion
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I/O Redirection
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Other Shell Features
Command Execution
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Command Types
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Processes
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Execution Techniques
Basic Scripts
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Shell Scripts Execution
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Comments
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Which Shell Executes a Script?
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The echo(C) Command
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Debugging Techniques
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Lab: Working with Batch Files
Shell Variables
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User Variables
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Shell Environmental Variables
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The read Command
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Positional Parameters
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Special Shell Variables
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Lab: Using Shell Variables
Quoting
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Shell Metacharacters
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Quoting Mechanisms
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Command Substitution
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Command Line Parsing Sequence
The eval Command Decision Constructs
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Exit Codes
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The test(C) Command
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The if Statement
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The case Statement
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Special Constructs
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Lab: Decision Constructs
Looping Constructs
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The expr(C) Command
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The while Statement
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The until Statement
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The for Statement
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Loop Commands
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Lab: Shell Functions
Shell Functions
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Shell Functions
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Passing Arguments
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The return Statement
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Lab: Shell Functions
Shell Signal Handling
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Asynchronous Events
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General Signals
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The trap Command
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Lab: Shell Signal Handling
Efficiency Consideration
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The time(C) Command
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Redefining the PATH Variable
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Absolute vs. Relative Pathnames
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Built-in Shell Commands
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Pipeline Efficiency
