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UNIX & Linux Shell Scripting (BASH, Korn & Bourne)

Audience

This class is ideal for experienced programmers and support staff, who have some experience of UNIX or Linux based systems, and who will be implementing further applications and systems.

The course is suitable for delegates wishing to use the Korn, Bourne or BASH shell on all versions of UNIX and Linux (e.g., AIX, Solaris, HPUX, Red Hat, SUSE etc...). The course comprehensively covers all three shells, but can focus on any one if required.

Duration

3 days. Hands on.

Select specific date to see price, venue and full details.

Learning Objectives

The course is highly interactive and consists of theory with plenty of hands on practical content.

This course will provide programmers and UNIX / Linux Support Staff with the skills necessary to construct extensive Shell scripts. By the end of the course, delegates will be able to confidently put together and maintain complex shell scripts.

The course covers Bourne, Korn and BASH scripting.

Pre-Requisites

Attendees should have a good basic understanding of UNIX or Linux, ideally gained through our UNIX & Linux Essentials course. Knowledge of a standard UNIX/Linux editor (e.g., vi, vim) will be required.

Course Content

UNIX & Linux Review

  • Major Components
  • The filesystem
  • Listing Directories
  • Creating Files
  • Displaying Files
  • Moving Around Directories
  • Redirection
  • Piping
  • Searching for a Pattern (grep)
  • Finding Files
  • User Security
  • Other Useful Commands

The Shell Environment

  • Shell Variables
  • Exporting variables
  • System Variables
  • The Back Quote
  • The Single Quote
  • The Double Quotes
  • The Backslash
  • Special Escape Characters
  • Recalling Previous Commands
  • Modifying Previous Commands

Shell Programming

  • Shell Scripts
  • Executing Shell Scripts
  • Passing Arguments To A Program
  • Positional Parameters
  • Special Shell Parameters
  • The Shift Command
  • Read Command
  • Expr Command
  • Korn Shell Arithmetic

Miscellaneous Commands

  • New Group
  • Cut and Paste
  • Comparing Files
  • Head and tail
  • Touching files
  • Grouping Commands
  • Shell Constructs
  • Typeset
  • Here Documents
  • Korn Shell Functions

Conditional Processing

  • Logical Constructs
  • The if Statement
  • Nesting if Conditionals
  • ELIF Statement
  • The Test Command formats
  • String Operators
  • Integer Operators
  • File Operators
  • Logical Operators
  • Case Statement

Conditional Looping

  • The For Command
  • For Statement Without Word List
  • The While Command
  • The Until Command
  • While True Command
  • Until False Command
  • The Break Command
  • The Continue Command

Additional Programming Topics

  • Shell Script Comments
  • The Exit Command
  • The Sleep Command
  • The Wait Command
  • The Set Command
  • The Unset Command
  • Special Variable Constructs
  • The Null Command
  • Signals used by Shell Procedures
  • Interrupt handling
  • Trace
  • Timing Command
  • getopts command
  • Korn Shell Arrays
  • Random Variable
  • Korn Shell Menu System
  • Programming Hints
  • Creating Efficient Shell Procedures
  • eval

The Stream Editor

  • The Stream Editor
  • Searching and Replacing Text
  • Deleting lines
  • Printing Lines
  • Edit Files

The Awk Utility

  • The awk utility
  • Operators
  • BEGIN and END
  • Arithmetic operators
  • Use of awk within a shell script

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