Shell Scripting using Bash

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Embedded Systems Software Engineering

Module 02: Shell Scripting  using Bash

Abstract:

The shell is a command interpreter. More than just the insulating layer between the operating system kernel and the user, it's also a fairly powerful programming language. A shell program, called a script, is an easy -to- use tool for building applications by "gluing together" system calls, tools, utilities, and compiled binaries. Virtually the entire repertoire of UNIX commands, utilities, and tools is available for invocation by a shell script. Shell scrip ts are especially well suited for administrative system tasks and other routine repetitive tasks not requiring the bells and whistles of a full-blown tightly structured programming language. This training concentrates on developing the understanding and programming skills for shell scripting using Bash shell.

Training Contents for Module 3: Shell Scripting using Bash

• ​Introduction to Bash Shell
• Basics For Shell Scripting on Linux
• Tools to Edit Shell Scripts
• Writing Scripts
  • Referencing Variables
  • Looping and Iteration
  • Conditions with if and case
  • Looping using While and Until
• Interacting with the Environment
  • Examining Environment Variables
  • Customizing Your Account
  • Handling Command-Line Arguments
  • Making Scripts Executable
• Scripting with Files
  • Working with File Modes
  • Testing Files with the test Command
  • Here Files and Interactive Programs
• Creating Command Pipelines 
• Shell Scripting Functions
  • Defining Functions
  • Using Functions
  • Using Arguments with Functions
  • Using Return Codes with Functions
  • Variable Scope: Think Globally, Act Locally
  • Understanding Recursion
• Processing Text with sed
  • Introducing sed
  • sed Versions
  • Installing sed
  • Invoking sed
  • Editing Commands
  • Selecting Lines to Operate On
  • Substitution
  • Advanced sed Invocation
• Graphing Data with MRTG
  • Working with MRTG
  • Monitoring Other Data with MRTG
  • Installing MRTG
  • Writing Scripts for MRTG
  • Configuring MRTG
  • Running MRTG
  • Monitoring Your Computer with MRTG
  • Monitoring Networks with MRTG
  • Monitoring Applications with MRTG
  • Debugging Shell Scripts
  • Deciphering Error Messages
  • Running Scripts in Debugging Mode
• Scripting for Administrators
  • Why Write Scripts
  • Scripting Complicated Commands
  • Troubleshooting Your Systems
  • Removing Minor Annoyances
  • Cleaning Up Data
  • Automating Daily Work

Other Modules in ESSE Training are as follows.

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