DASVM’S Linux Shell Scripting Training is 100% hands-on practical classes. A shell script is essentially a series of commands written in a text file that the shell interpreter runs to automate tasks and perform system administration functions. You can use shell scripts to automate repetitive tasks, set up environment variables, run backups, and more. Developers use Linux shell scripting to automate tasks, customize their environment, and increase their efficiency and productivity. We crafted our course syllabus which gives basic to advanced level. Enroll in this guided project to learn the basics of running Linux shell scripts.

Course Objectives:

In this course, you will learn to:

• Create and execute a simple bash shell script.
• After you complete this course you will understand the basics of writing a shell script.

Course content

Linux Command Review

• Basic Linux commands
• General commands
• File and directory handling commands
• Filename generation characters
• I/O Redirection features
• Other commands

Getting Started

• What is a shell script?
• Development guidelines
• Creating and editing shell scripts
• Naming and storing shell scripts
• Executing shell scripts
• Lab: Write a simple shell script

Using Variables

• Environment variables
• Local variables
• Assigning values to variables
• Assessing variable values
• Using quotes
• Delimiting variable names
• Echo control sequences
• Lab: Add variables to a script

Integer Arithmetic

• Using the expr command
• Using the (( )) notation
• Lab: Add integer arithmetic to a shell script

Handling Run-Time Data

• The read command
• Command-line arguments
• Lab: Writing a generic shell script
• Lab: Writing an interactive shell script

Condition Execution

• The if statement
• The test command
• Other test notations
• Default and substitute variables
• Exit status codes
• Lab: Adding validation to previous scripts

Loop Constructs

• The while loop
• The until loop
• The for loop
• The while true and until false loops
• Loop control commands
• Lab: Enhancing the previously written scripts
• Lab: Writing a guess-the-number game

Multi-Branch Decisions

• The case statement
• Menu-driven applications
• Lab: Developing and writing a menu system

Functions

• What is a function?
• Syntax
• Examples
• Lab: Add a function to a script

Interrupt Handling

• Interrupt signals
• Trapping interrupts
• Lab: Adding traps to the menu script

Additional Features and Facilities

• The exec commands
• The includes notation
• More about loops
• Arrays
• Here Documents
• Lab: Create a here script

Redirection, Pipes and Filters

• Standard I/O and redirection
• Pipes
• Command separation
• Conditional execution
• Grouping Commands
• LINUX filters
• The tee command

Backup and Restore Utilities

• Archive devices
• The cpio command
• The tar command
• The dd command

Background Job Scheduling

• Starting background jobs
• Background tasks and the nohup command
• Process priorities and the nice command
• Job control
• Scheduling jobs with the at the command
• Scheduling jobs with the cron command

Regular Expression Notation

• Regular expressions
• Extended regular expressions

Searching Files for Patterns

• The grep family of commands
• The grep command
• The fgrep command
• The egrep command

The Stream Editor – sed

• Introduction and command line syntax
• The sed program structure
• sed program processing
• Use sed commands
• sed addresses
• sed instructions
• Hold and get functions>/div>
• Advanced flow control

Commands for Comparing Files

• Compare two files with the cmp command
• Compare two files with the comm command
• Compare two files with the diff and sdiff commands
• Compare large files with the bdiff command

File Manipulation Commands

• The file command
• The head command
• The tail command
• The cut command
• The paste command
• The pr command
• The split and csplit commands

Identify and Translate Characters

• od – octal dump
• Use cat to display non-printing characters
• The expand and unexpand commands
• The tr command

Sorting Files

• The sort command
• Specify sort keys with –k
• Sort by column positions
• The uniq command

Introduction to the Pattern Scanning Utility – awk

• Introduction and command line syntax
• The awk program structure
• Use regular expressions
• Operators
• Simple patterns
• Extended patterns
• Comments
• Special patterns (BEGIN and END)
• Program variables
• Built-in variables
• User defined variables
• Mathematical operators
• Enhanced printing
• Handling user variables

AWK Program Control Structures

• Program control structures
• The if construct
• The while and do … while constructs
• The basic for construct
• Associative array handling
• Functions
• Built in functions
• The system function
• The getline function
• User defined functions

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